Triethylene Glycol
Table of
Contents
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Quality, Service, and Product Information . . . . . . . . . . . . . . . . . . . . . 1
Table 1 Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Product Stewardship Guidelines and Principles . . . . . . . . . . . . . . . . . . 3
on-supported applications of Dow-manufactured EG, DEG,TEG,TETRA,
N
and By-Products of Glycol Manufacturing . . . . . . . . . . . . . . . . . . . . 3
Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Table 2 Physical Properties of Triethylene Glycol . . . . . . . . . . . . . . . 5
Table 3 Solubilities of Various Materials in Triethylene Glycol . . . . . . . . 6
Table 4 Triethylene Glycol Compatibility with Elastomeric Materials . . . . . 7
Table 5 Constant Boiling Mixtures of Triethylene Glycol . . . . . . . . . . . 8
Figure 1 Freezing Points of Aqueous Triethylene Glycol Solutions . . . . . . . 9
Figure 2 Boiling Points vs. Composition of Aqueous Triethylene
Glycol Solutions at Various Pressures . . . . . . . . . . . . . . . . . 10
Figure 3 Condensation Temperatures vs. Composition of Aqueous
Triethylene Glycol Solutions at Various Pressures . . . . . . . . . . . 11
Figure 4 Vapor Pressures of Triethylene Glycol at Various Temperatures . . . 12
Figure 5 Vapor Pressures of Aqueous Triethylene Glycol Solutions at
Various Temperatures . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 6 Specific Gravities of Aqueous Triethylene Glycol Solutions . . . . . . 14
Figure 7 Viscosities of Aqueous Triethylene Glycol Solutions . . . . . . . . . 15
Figure 8 Specific Heats of Aqueous Triethylene Glycol Solutions . . . . . . . 16
Figure 9 Thermal Conductivities of Aqueous Triethylene
Glycol Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Figure 10 Dew Points of Aqueous Triethylene Glycol Solutions at
Various Contact Temperatures . . . . . . . . . . . . . . . . . . . . 18
Figure 11 Comparative Hygroscopicities of Various Glycols
at 70°F (21°C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Figure 12 Refractive Indices of Pure Triethylene Glycol . . . . . . . . . . . . . 20
Table of
Contents
Figure 13 Refractive Indices of Aqueous Triethylene Glycol Solutions
at 77°F (25°C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Figure 14 Surface Tensions of Pure Triethylene Glycol . . . . . . . . . . . . . 22
Figure 15 Surface Tensions of Aqueous Triethylene Glycol Solutions
at 77°F (25°C) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Figure 16 Electrical Conductivities of Aqueous Triethylene
Glycol Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Health and Environmental Information. . . . . . . . . . . . . . . . . . . . . 25
Health Effects . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Environmental Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Biodegradation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Storage and Handling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Shipping Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Product Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Emergency Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Sales Office . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
ii
Introduction
Product Information
Precautions:
Carefully review our current Material Safety
Data Sheet.
Formula
C6H14O4
Molecular Formula HOCH2CH2OCH2CH2OCH2CH2OH
Dow: Your Best Source
for Triethylene Glycol Quality
CAS Number 112-27-6
Synonyms Glycol-bis(hydroxyethyl) ether
2,2’-[1,2-ethanediylbis(oxy)] bis-ethanol
Triglycol
TEG
T3EG
TriEG
Dow is the world’s largest producer of
ethylene oxide and glycols, with over 70
years of experience in their manufacture,
marketing, and research and development.
The uniform implementation of statistical
process control at all of our plants enables
us to consistently deliver the high-quality
product you require. Our total approach to
Quality and Quality Systems is continuously
improved to ensure that our facilities meet
the requirements for registration to the
stringent ISO 9000 series of standards.
Triethylene glycol is a transparent, colorless,
low-volatility, moderate-viscosity, watersoluble liquid. Under normal conditions,
there is no detectable odor; under high vapor
concentrations, a slightly sweet odor may be
detected. It is completely miscible with water
and many organic liquids. Triethylene glycol
has properties similar to other glycols and
may be used preferentially in applications
requiring a higher boiling point, higher
molecular weight, or lower volatility than
diethylene glycol.
Optimum performance demands a quality
product, and that is what we deliver. Our
vast distribution system of plants, terminals,
tankers, barges, tank cars, and trucks helps
to ensure your delivery of triethylene glycol
when and where you need it.
The hydroxyl groups on triethylene glycol
undergo the usual alcohol chemistry giving
a wide variety of possible derivatives.
Hydroxyls can be converted to aldehydes,
alkyl halides, amines, azides, carboxylic
acids, ethers, mercaptans, nitrate esters,
nitriles, nitrite esters, organic esters, peroxides, phosphate esters and sulfate esters.
Service
For solutions to problems or answers to
questions, Dow offers extensive technical
service and support, available through trained
sales representatives as well as our skilled
staff from the Research and Development
Department. Your order of triethylene glycol
will be processed expertly and quickly when
you place a call to one of our many helpful
customer service representatives. (See page 29.)
Triethylene glycol may be used directly as a
plasticizer or modified by esterification. The
solubility properties of triethylene glycol are
important for many applications. End-uses
for triethylene glycol are numerous. (See
Table 1.)
Introduction
Introduction
Table 1
Applications
Hygroscopicity
• Dehydration of natural gas
• Moisturizing and plasticizing cork, adhesives
Plasticizer
• Safety glass
• Separation membranes (silicone rubber,
polyvinyl acetate, cellulose triacetate)
• Ceramic materials (resistant refractory
plastics, molded ceramics)
Low Volatility
• Gas dehydration
Solvent
• Resin impregnants and other additives
• Steam-set printing inks
• Aromatic and paraffinic hydrocarbons separations
• Cleaning compounds
• Polyethylene terephthalate production equipment
cleaning
• Cyanoacrylate and polyacrylonitrile
Chemical Intermediate
• Unsaturated polyester resin
• Various resins of the alkyd type used
as laminating agents in adhesives
• Esterification products used in plasticizer
intermediates for nitrocellulose lacquers
and vinyl resins
• Polyester polyols for polyurethanes
• Thermoplastic polyurethanes
• Silcone compounds
• Emulsifiers
• Lubricants
Freezing Point Depression
• Heat transfer fluids
Introduction
Introduction
Product Stewardship
Guidelines and Principles of
The Dow Chemical Company
•The use of Dow EG Products in fire
extinguishing sprinkler systems is not
supported by Dow.
•The use of Dow EG Products in the
manufacture of munitions is not supported
by Dow.
The following bullet points identify some
applications that are NOT supported by
Dow for EG Products on a go-forward basis.
The reasons for these limitations include
areas in which we have decided not to
pursue for general business reasons and
actions that would minimize unnecessary
risk and liabilities to the business. In addition,
the following list of uses not supported by
Dow does not imply a Dow warranty or Dow
support of uses in applications not covered
by this list. This list is not all-inclusive.
•The use of Dow EG Products in the
production of deicers for use on roadways
and pedestrian walkways is not supported
by Dow.
•The use of Dow EG Products as a component
of heat transfer fluids in systems where the
heat transfer fluid could infiltrate (e.g., via
an exchanger leak, backflow prevention
failure, or other means) a potable water
system is not supported by Dow.
Non-supported applications of Dowmanufactured EG, DEG,TEG,TETRA, and
By-Products of Glycol Manufacturing
(Dow EG Products):
•The use of Dow EG Products purposely as
a non-reacted component in a formulation
for direct internal or external human/
animal contact, including but not limited
to ingestion, inhalation, and skin contact,
and in medical/veterinary devices and
medical/veterinary applications is not
supported by Dow. (Examples of some such
applications are uses as a direct component
in foods, beverages, pharmaceuticals, cosmetics, or personal care products.)
•The use of Dow EG Products in the
production of tobacco and in the manufacture of tobacco products (including
but not limited to additives, humectants,
filters, inks, and paper) is not supported
by Dow.
•The use of Dow EG Products for the
generation of artificial smoke/theatrical
fogs/mist is not supported by Dow.
• The use of Dow EG Products for consumer
or hospital deodorizing or air “purifying”
purposes by spraying as an aerosol is not
supported by Dow.
•The use of Dow EG Products as an
ingredient in fuel for warming foods
(SternoTM -like application) or in fuel for
heating an enclosed space where human
exposure is possible is not supported
by Dow.
•The use of Dow EG Products as a
non-reacted component in adhesives,
packaging that has direct contact with
food or beverages is not supported by Dow.
Introduction
Introduction
NO WARRANTIES ARE GIVEN;
ALL IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS
FOR A PARTICULAR PURPOSE ARE
EXPRESSLY EXCLUDED.
•The use of Dow EG Products as a nonreacted component in the formulation
of glues, pastes, or items where the
potential for sufficient human contact
and/or ingestions exists (including but
not limited to children’s school glues/
paste or art/craft glue/paste) is not
supported by Dow.
Further, any violation of or failure to
comply with the information contained in
Dow’s Material Safety Data Sheet, Product
Label, Product Information Guide, product
literature or other product safety information
is a misuse of Dow’s EG and Higher Glycol
Products. These documents can be obtained
by contacting your Dow representative or
Dow’s Customer Information Group
(800) 447-4369. We can never specify all
circumstances where misuse might occur,
so if at any time a customer or downstream
use appears to be improper or unsafe, please
contact our Product Steward at (225) 353-6122.
To enter into new applications beyond
the traditional standard industrial use
applications, contact your Dow representative
to review the specific application. Dow has
a risk assessment process whereby the
application will be reviewed and a determination will be made as to whether the
application meets Dow’s requirements and
can therefore be supported by Dow. Because
use conditions and applicable laws may
differ from one location to another and
may change with time, when an application
is supported by Dow, Dow does not warrant
and is not responsible for the use in such
application.
Introduction
Properties
Table 2
Physical Properties of Triethylene Glycol
Determined on purified samples of Triethylene Glycol
Property
Scientific Units
Common Units
Autoignition Temperature
349°C
660°F
Boiling Point at 760 mm Hg
288.0°C
550.4°F
0.0073°C/kPa
0.055°C/mm Hg
3,313.3 kPa
24,852 mm Hg
0.443 L/gmol
7.10 ft 3/lbmol
Critical Temperature
440°C
824°F
Dielectric Constant
23.69
23.69
0.20 x 10-6 mhos/cm
0.002 micromhos/cm
Evaporation Rate (Butyl Acetate = 1)
<0.001
<0.001
Flammable Limits in Air, Lower
0.9%(V)
0.9%(V)
Flammable Limits in Air, Upper
9.2%(V)
9.2%(V)
Flash Point, Cleveland Open Cup ASTM D 92
191°C
375°F
Flash Point, Pensky-Martens Closed Cup ASTM D 93
177°C
350°F
∆ Boiling Point/∆ Pressure (750–770 mm Hg)
Critical Pressure
Critical Specific Volume
Electrical Conductivity
Freezing Point
-4.3°C
24.3°F
-3,500 kJ/gmol
-10,020 Btu/lb
Heat of Vaporization
62.5 kJ/gmol
179 Btu/lb
Molecular Weight
150.17 g/mol
150.17 g/mol
Onset of Initial Decomposition
240°C
464°F
Refractive Index, nD, 20°C
1.4559
1.4559
Solubility in Water at 20°C, wt%
100%
100%
Solubility of Water in Triethylene Glycol at 20°C, wt%
100%
100%
Specific Gravity, 20/20°C
1.1255
1.1255
Heat of Combustion at 25°C
∆ Specific Gravity vs. ∆ Temperature (10–40°C)
0.00078/°C
0.00078/°C
Surface Tension
45.5 mN/m
45.5 dynes/cm
Vapor Density (Air = 1)
5.2
5.2
Vapor Pressure at 20°C
<0.001 kPa
<0.01 mm Hg
49.0 mPs
49.0 cP
Viscosity at 20°C
The data provided for these properties are typical values, intended only as guides, and should not be
construed as sales specifications.
Properties
Properties
Table 3
Solubilities of Various Materials in Triethylene Glycol
Solubility, g/100 mL of Triethylene Glycol at 25°C
Material
Solubility
Material
Solubility
Acetone
Completely Soluble
Paraffin Oil
Insoluble
Animal Glue (Dry)
Slightly Soluble
Phenol
Completely Soluble
Benzene
Completely Soluble
Pine Oil
Completely Soluble
Carbon Tetrachloride
40.6
Rosin
5.0
Castor Oil
0.3
Shellac
Slightly Soluble
Cellulose Acetate
Completely Soluble
Soy Bean Oil
Insoluble
Chlorobenzene
Completely Soluble
Sperm Oil
Insoluble
Coconut Oil
Insoluble
Tall Oil
10.1
Cottonseed Oil
Insoluble
Tetrachloroethylene
17.7
Dextrin
Completely Soluble
Toluene
33.0
Dextrin (10% in water)
Insoluble
Tung Oil
Insoluble
Dibutyl Phthalate
19.8
Turkey Red Oil
12.3
Dichloroethyl Ether
Completely Soluble
Urea
31.0
Diethanolamine
Completely Soluble
Ethyl Ether
20.4
Ethylene Glycol Stearate
Slightly Soluble
Gum Damar
Slightly Soluble
Heptane
Slightly Soluble
Hydrous Wool Fat
Slightly Soluble
Kauri Gum
Slightly Soluble
Lard Oil
Insoluble
Linseed Oil
Insoluble
Methanol
Completely Soluble
Monoethanolamine
Completely Soluble
Nitrocellulose
Completely Soluble
o -Dichlorobenzene
Completely Soluble
Olive Oil
Insoluble
Properties
Properties
Table 4
Triethylene Glycol Compatibility with Elastomeric Materials
Material
Temperature
25˚C (77˚F)
80˚C (176˚F)
160˚C (320˚F)
Adiprene™ L-100
Good
Poor
Poor
Black Rubber 3773
Good
Poor
Poor
Buna N (or 25)
Good
Good
Buna S
Good
Fair
Butyl Rubber
Good
Good
Compressed Asbestos
Good
Good
Fair
EPDM
Good
Good
Good
EPR Rubber
Good
Good
Good
Hycar™ D-24
Good
Fair
Hypalon™
Good
Poor
Poor
Kalrez™
Good
Good
Good
Natural Rubber Gum
Good
Poor
Poor
Neoprene 7797
Good
Fair
Red Rubber Number 107
Good
Poor
Poor
Saraloy™ 300
Good
Poor
Poor
Silicone No. 65
Good
Good
Thiokol™ 3060
Good
Poor
Poor
Viton™ A
Good
Good
Poor
Poor
Properties
Properties
Table 5 Constant Boiling Mixtures of Triethylene Glycol
Components
Specific
Gravity
at
20/20°C
Azeotrope
Composition % by Wt at 20°C
Boiling Point Boiling Point
at
at
In
In
In
760 mm Hg, 760 mm Hg, Azeotrope
Upper
Lower
0°C
0°C
Layer
Layer
Relative
Volume
of
Layers At
20°C, %
Triethylene Glycol
Acenaphthene
1.1255
288.0
277.9
271.5
35
65
(c)
(c)
(c)
(c)
(c)
(c)
Triethylene Glycol (5 mm Hg)
Benzyl Ether
1.1255
145.5 (a)
Azeo(a)
28
72
15
85
60
40
U 72
L 28
Triethylene Glycol
Benzyl Phenyl Ether
1.1255
288.0
286.5
280.0
40
60
(c)
(c)
(c)
(c)
(c)
(c)
Triethylene Glycol
Biphenyl
1.1255
288.0
256.1
None
Triethylene Glycol (3 mm Hg)
Diethylene Glycol
1.1255
1.1184
135.3(a)
108.0(a)
None(a)
Triethylene Glycol
Diphenylmethane
1.1255
288.0
263.0
263.0
20
60
(c)
(c)
(c)
(c)
(c)
(c)
Triethylene Glycol
1,2-Diphenylmethane
1.1255
288.0
284.5
275.5
42
58
(c)
(c)
(c)
(c)
(c)
(c)
Triethylene Glycol
Ethyl Phthalate
1.1255
288.0
298.5
< 285.5
> 58
(c)
(c)
(c)
Triethylene Glycol
Isoamyl Benzoate
1.1255
288.0
262.0
261.4
14
86
(c)
(c)
(c)
(c)
(c)
(c)
Triethylene Glycol
Isoamyl Oxalate
1.1255
288.0
268.0
Reacts
Triethylene Glycol
Isoamyl Salicylate
1.1255
288.0
277.5
269.0
30
70
(c)
(c)
(c)
(c)
(c)
(c)
Triethylene Glycol
Methyl Phthalate
1.1255
288.0
283.2
277.0
33
67
(c)
(c)
(c)
(c)
(c)
(c)
Triethylene Glycol
Phenyl Benzoate
1.1255
288.0
315.0
286.0
80
20
(c)
(c)
(c)
(c)
(c)
(c)
Triethylene Glycol
Phenyl Ether
1.1255
1.0677(b)
288.0
259.0
258.7
3
97
(c)
(c)
(c)
(c)
(c)
(c)
Triethylene Glycol (4 mm Hg)
Phenyl Ether
1.1255
1.0677(b)
141.0(a)
102.0(a)
None(a)
Triethylene Glycol
Water
1.1255
1.0000
288.0
100.0
None
Triethylene Glycol (10 mm Hg)
Water
1.1255
1.0000
161.0(a)
11.0 (a)
None(a)
(a) At the pressure investigated; (b) At 30/20°C; (c) Data not available
Properties
Properties
Figure 1: Freezing Points of
Aqueous Triethylene Glycol Solutions
Figure 1 Freezing Points of Aqueous Triethylene Glycol Solutions
50
10
40
0
30
20
10
0
-20
-10
-20
-30
Temperature, °F
Temperature, °C
-10
-30
-40
-40
-50
-50
0
10
20
30
40
50
60
70
Triethylene Glycol, Percent by Weight in Water
80
90
100
-60
Properties
Properties
Figure 2: Boiling Points vs. Composition of
FigureTriethylene
2 Aqueous
Glycol Solutions at Various Pressures
Boiling Points vs. Composition of Aqueous Triethylene
Glycol Solutions at Various Pressures
660
350
620
580
300
540
Temperature, °C
460
420
200
380
340
150
Temperature, °F
500
250
300
1520 mm Hg*
260
760 mm Hg
100
220
300 mm Hg
180
140
50
0
10
20
30
40
50
60
70
Triethylene Glycol, Percent by Weight in Water
80
90
100
*2 atmospheres absolute, 1 atmosphere gauge
*2 atmospheres absolute, 1 atmosphere gauge
10
Properties
Properties
Figure 3: Condensation Temperatures vs. Composition of
FigureTriethylene
3 Aqueous
Glycol Solutions at Various Pressures
Condensation Temperatures vs. Composition of Aqueous Triethylene
Glycol Solutions at Various Pressures
660
350
620
580
300
540
460
420
m Hg
7 60 m
200
m Hg
380
300 m
340
Temperature, °F
Temperature, °C
500
g*
m H
m
0
152
250
300
150
260
220
100
180
50
140
0
10
20
30
40
50
60
70
Triethylene Glycol, Percent by Weight in Water
80
90
100
*2 atmospheres absolute, 1 atmosphere gauge
*2 atmospheres absolute, 1 atmosphere gauge
11
Properties
Properties
Figure 4: Vapor Pressures of Triethylene Glycol
Figure 4 at Various Temperatures
Vapor Pressures of Triethylene Glycol at Various Temperatures
Vapor Pressure, mm Hg
1000
800
600
400
300
200
220
240
280
320
Temperature, °F
360 400
100
80
60
40
30
20
480
560
640
Triethylene Glycol
Antoine Constants
A = 7.6302007
B = 2156.4581
C = 165.92442
10
8
6
4
3
2
1
440
Log(P) = A–B/(t+C)
mm Hg, Log10 , ˚C
100
120
140
160
180 200
Temperature, °C
240
280
320
360
Triethylene Glycol Antoine Constants for Calculating Vapor Pressure
Triethylene Glycol
Antoine Constants for Calculating Vapor Pressure
3-Constant Equation (Temperature Range = 150–300°C)
3-Constant Equation
(Temperature
Range = 150 - 300°C)
A = 7.6302007
Range = 150 –300°C
A = 7.6 3B0=22156.4581
007
an ge = 1 5 0 - 3 0 0 °C
P = mmRHg
T = °C P = m m H g
B = 21 5 6C .=4165.92442
5 81
C = 16 5Log
.9 2104(P)
4 2= A – B/(T + C)
T = °C
5-Constant
Equation
(Temperature
Range
=
360.15–712.51°K)
Log 10 (P) = A – B/(T + C)
A = 95.5205
= 360.15 –712.51°K
5-Constant Equation
(Temperature
Range = 360.15 - Range
712.51°K)
B = 12834.7 P = Pa
A = 9 5 .5C2=00.0
5 R an ge = 3 6 0 .1 5 - 71 2 .51 K
T = Kelvin
B = 1 2 8 3D 4=.-9.66752
7
P = Pa
C = 0 .0 E = 3.0015 x 10-29
T = K el v i n
= 10
D = -9.6N6752
ln(P) = A – B/(T + C) + D(ln(T)) + ETN
E=3.0015 x 10 -29
N=10
ln(P) = A – B/(T + C) + D(ln(T)) + ET N
12
Properties
Properties
Figure
5: Vapor
Figure
5 Pressures of
Aqueous Triethylene Glycol Solutions at Various Temperatures
Vapor Pressures of Aqueous Triethylene Glycol Solutions
at Various Temperatures
-20
20
40
Temperature, ˚F
80
120
160
200
240
300
0 50
70
80
90
95
97
98
99
99.5
Vapor Presure, mm Hg
10,000
6,000
4,000
2,000
1,000
600
400
200
100
60
40
20
10
Freezing Point
6
Curves
4
2
1
0.6
0.4
0.2
0.1
-40
-20
0
100
0
20
40
Temperature, ˚C
60
80
100
130
Triethylene Glycol, Percent by Weight in Water
-40
160
Triethylene Glycol Antoine Constants for Calculating Vapor Pressure
3-Constant
Antoine
Equation for
Log Calculating
(P) = A – B/(T +Vapor
C)
Triethylene Glycol
Antoine
Constants
Pressure
P = mm Hg, T = °C
3-Constant Antoine Equation
TriEG, Wt%
A
B
C
Log 10 (P) = A – B/(T
+ C)
0
7.959199
1663.545
227.575
P = mm Hg, 50T = °C
7.922294
1671.501
228.031
10
T r iE G , W t %
0
50
70
80
90
95
97
98
99
9 9 .5
10 0
70
80
90
95
97
98
99
99.5
100
7.878546
7.837076
7.9 57.726126
919 9
7.9 27.620215
2294
7.8 77.495349
8546
7.8 37.404435
7 0 76
7.211145
7.7 27.042989
61 2 6
7.6 27.472115
0 21 5
A
7. 4 9 5 3 4 9
7. 4 0 4 4 3 5
7.21114 5
7. 0 4 2 9 8 9
7.4 7 211 5
1681.363
1697.006
1728.047
1806.257
1841.522
1881.474
1926.114
1970.802
2022.898
13
228.237
228.769
16 6 3 .5 4229.823
5
16 71 .5 0236.227
1
16 81 .3 6238.048
3
16 9 7.0 0240.666
6
242.799
17 2 8 .0 4242.865
7
18 0 6 .2 5152.573
7
B
C
1 8 41 . 5 2 2
1 8 8 1 . 4 74
19 2 6 .114
19 7 0 .8 0 2
2 0 2 2 .8 9 8
2 2 7. 5 7 5
2 2 8 . 0 31
2 2 8 .2 3 7
2 2 8 .7 6 9
2 2 9 .8 2 3
2 3 6 .2 2 7
2 3 8 .0 4 8
2 4 0 .6 6 6
2 4 2 .7 9 9
2 4 2 .8 6 5 Properties
15 2 .5 7 3
Properties
Figure 6: Specific Gravities of Aqueous
Figure 6Glycol
Solutions
Triethylene
Specific Gravities of Aqueous Triethylene Glycol Solutions
1.18
Freezing Point
Curves
1.16
-50˚F
1.14
0˚F
Apparent Specific Gravity, T/60˚F
1.12
50˚F
100˚F
1.10
1.08
150˚F
1.06
200˚F
1.04
1.02
250˚F
1.00
300˚F
0.98
0.96
0.94
0.92
0.90
0
10
20
30
40
50
60
70
Triethylene Glycol, Percent by Weight in Water
80
90
100
Specific Gravity at T/60°F = A + Bx + Cx2
x = Weight % Triethylene Glycol
T, °F
Specific Gravity at T/60°F
= A + Bx +A Cx 2
-50
x = Weight % Triethylene
Glycol 1.0502
T , °F
-5 0
0
50
10 0
15 0
200
250
300
0
50
100
150
200
250
300
1.0319
1.0121
0.9920
1 .0 5 00.9804
2
1 .0 310.9627
9
1 .01 20.9413
1
0 .9 9 20.9177
0
A
0 .9 8 0 4
0 .9 6 2 7
0 . 9 41 3
0 . 9 17 7
B
1.8268E-3
1.7466E-3
1.5247E-3
1.7518E-3
1.5410E-3
1.4068E-3
1.3205E-3
1.2511E-3
14
C
-5.2009E-6
-4.8304E-6
-2.8794E-6
B
-5.4955E-6
1 .8 2 6 8-4.3884E-6
E -3
1 .74 6 6-3.5089E-6
E -3
1 .5 2 4 7-2.7991E-6
E -3
1 .7 518-2.0848E-6
E -3
1 .5 41 0 E -3
1 .4 0 6 8 E -3
1 .3 2 0 5 E -3
1 .2 511 E -3
C
-5 .2 0 0 9 E -6
-4 .8 3 0 4 E -6
-2 .8 7 9 4 E -6
-5 .4 9 5 5 E -6
-4 .3 8 8 4 E -6
-3 .5 0 8 9 E -6
-2 .7 9 91 E -6
-2 .0 8 4 8 E -6
Properties
Properties
Figure 7: Viscosities of
FigureTriethylene
7
Aqueous
Glycol Solutions
Viscosities of Aqueous Triethylene Glycol Solutions
1000
600
400
Freezing Point
Curves
0˚F
Viscosity, Centipoises
200
100
60
40
50˚F
20
100˚F
10
6
4
150˚F
200˚F
2
250˚F
300˚F
1
0.6
0.4
0.2
0.1
0
10
20
30
40
50
60
70
Triethylene Glycol, Percent by Weight in Water
80
90
100
Viscosity, Centiposies (cP) = A x 10Bx
x = Weight % Triethylene Glycol
T, °F
A
Viscosity, Centiposies
(cP) = A x 10
0
1.53010
x = Weight % Triethylene
Glycol 1.09200
50
T, °F
0
50
10 0
15 0
200
250
300
100
150
200
250
300
0.58916
0.37045
1 .5 30.27371
010
1 .0 90.18759
200
0.14026
A
0 .5 8 916
0 .3 7 0 4 5
0 . 2 7 3 71
0 .18 7 5 9
0 .14 0 2 6
Bx
B
2.9967E-2
1.9348E-2
1.5763E-2
1.3481E-2
1.1731E-2
9.7064E-3
8.1319E-3
15
B
2 .9 9 6 7 E -2
1 .9 3 4 8 E -2
1 .5 7 6 3 E -2
1 .3 4 81 E -2
1 .17 31 E -2
9 .7 0 6 4 E -3
8 .1 319 E -3
Properties
Properties
Figure
8: Specific
Figure
8 Heats of
Aqueous
Triethylene
Glycol
Solutions
Specific
Heats of
Aqueous
Triethylene Glycol Solutions
-40
0
40
80
240
280
320
360
0
20 10
30
40
50
60
70
Freezing Point
Curves
1.0
Specific Heat, Btu/lb/˚F
0.9
80
90
0.8
100
0.7
0.6
0.5
0.4
-50
0
50
100
Temperature, ˚C
150
Triethylene Glycol, Percent by Weight in Water
1.1
Temperature, ˚F
120 160 200
200
Specific Heat = A + BT+CT2
T = Temperature,2 °C
Specific Heat = A + BT+CT
T = Temperature,TriEG,
°C 0Wt%
T r iE G , W t %
0
10
20
30
40
50
60
70
80
90
10 0
10
20
30
40
50
60
70
80
90
100
A
1.00540
A 0.96705
0.92490
1 .0 0 50.88012
40
0 .9 6 70.83229
05
0 .9 2 0.78229
490
0 .8 8 0.72200
01 2
0 .8 3 0.66688
229
0 .7 8 0.60393
229
0.53888
0 .7 2 2 0 0
0.48614
0 .6 6 6 8 8
0 .6 0 3 9 3
0 .5 3 8 8 8
0 . 4 8 614
B
-2.7286E-4
-2.7144E-5
2.0429E-4
4.3000E-4
6.2286E-4
7.9286E-4
9.4000E-4
1.0871E-3
1.2043E-3
1.2800E-3
1.3929E-3
16
C
2.9143E-6
2.4952E-6
B
2.4524E-6
-2 .7 2 8 61.6952E-6
E -4
-2 .714 4 1.3714E-6
E -5
2 .0 4 2 9 E1.0857E-6
-4
4 .3 0 0 0 E8.0000E-7
-4
6 .2 2 8 6 E4.7620E-7
-4
7.9 2 8 6 E2.8571E-7
-4
9 .4 0 0 0 E1.9048E-7
-4
-5.7140E-8
1 .0 8 71 E -3
1 .2 0 4 3 E -3
1 .2 8 0 0 E -3
1 .3 9 2 9 E -3
C
2 .914 3 E -6
2 .4 9 5 2 E -6
2 .4 5 2 4 E -6
1 .6 9 5 2 E -6
1 .3 714 E -6
1 .0 8 5 7 E -6
8 .0 0 0 0 E -7
4 .7 6 2 0 E -7
2 .8 5 71 E -7
1 .9 0 4 8 E -7
-5 .714 0 E -8
Properties
Properties
Figure 9: Thermal Conductivities of
FigureTriethylene
9 Aqueous
Glycol Solutions
Thermal Conductivities of Aqueous Triethylene Glycol Solutions
Thermal Conductivity, Btu (ft)/hr (ft2 ) ˚F
0.40
40
80
Temperature, ˚F
160
200
240
120
280
320
360
0
Freezing Point
Curves
10
20
0.35
30
0.30
40
0.25
50
0.20
60
0.15
70
0.10
80
90
100
0.05
-20
0
20
40
60
80
100
120
Temperature, ˚C
140
160
180
Triethylene Glycol, Percent by Weight in Water
0.45
0
200
Thermal Conductivity = A + BT
Thermal Conductivity
= A + BT°C
T = Temperature,
T = Temperature, TriEG,
°C Wt%
TriEG, Wt%
0
10
20
30
40
50
60
70
80
90
10 0
0
10
20
30
40
50
60
70
80
90
100
A
A
0.33667
0.31000
0 .3 3 6 60.29000
7
0.27200
0 . 31 0 0 0
0 .2 9 0 00.25133
0
0.22767
0 .2 7 2 00.20933
0
0 .2 51 30.18800
3
0 .2 2 7 60.17267
7
0 .2 0 9 30.15567
3
0 .18 8 00.14133
0
0 .17 2 6 7
0 .1 5 5 6 7
0 .141 3 3
B
7.1667E-4
B
6.0000E-4
4.0000E-4 7.1 6 6 7 E -4
2.0000E-4
6 .0 0 0 0 E -4
3.3333E-5
4 .0 0 0 0 E -4
3.3333E-5
2 .0 0 0 0 E -4
-1.6667E-4
-2.0000E-4 3 . 3 3 3 3 E -5
-2.8333E-4 3 . 3 3 3 3 E -5
-2.8333E-4 -1 . 6 6 6 7 E -4
-3.1667E-4 -2 . 0 0 0 0 E -4
-2 .8 3 3 3 E -4
-2 .8 3 3 3 E -4
-3 .16 6 7 E -4
17
Properties
Properties
Figure 10
Figure 10: Dew Points of Aqueous Triethylene Glycol Solutions at
Dew Points of Aqueous Triethylene Glycol Solutions at
Various Contact Temperatures
Contact Temperatures of Solution, ˚F
20
40
60
80
0
Dew Point, ˚C
50
100
Triethylene Glycol,
Percent by Weight
in Water
40
30
50
70
20
Freezing Point
Curves
10
0
80
90
95
98
-10
Frost Point, ˚C
120
-20
99
99.5
-30
-40
-50
-30
-20
-10
0
10
20
30
Contact Temperatures of Solution, ˚C
Dew or Frost Point = A + BT
Dew or Frost Point
= A + BT
T = Temperature, °C
T = Temperature,TriEG,
°C Wt%
A
TriEG, Wt%
50
70
80
90
95
98
99
9 9 .5
50
70
80
90
95
98
99
99.5
A
-3.0308
-7.0009
-3 .0-10.745
308
-7.0 0-17.923
09
-1 0 .-25.252
74 5
-17.-34.675
923
-2 5 .-41.419
252
-47.195
-3 4 .6 7 5
-41 .419
-4 7.19 5
B
1.01050 B
1.01610
1.01160
0.98187
0.93019
0.85598
0.80150
0.73263
18
40
140
130
120
110
100
90
80
70
60
50
40
30
20
10
0
-10
-20
-30
-40
-50
Frost Point, ˚F
60
-20
Dew Point, ˚F
Various Contact Temperatures
50
1 .010 5 0
1 . 0 1 61 0
1 .0116 0
0 .9 818 7
0 .9 3 019
0 .8 5 5 9 8
0 .8 015 0
0 .7 3 2 6 3
Properties
Properties
Figure 11: Comparative Hygroscopicities of
Various
Glycols
Figure
11 at 70°F (21°C)
Comparative Hygroscopicities of Various Glycols at 70°F (21°C)
Percent Water (Based on Dry Humectant at Equilibrium)
100
80
70
60
50
Ethylene Glycol
Diethylene Glycol
40
30
Propylene Glycol
20
Dipropylene Glycol
10
8
7
6
5
Triethylene Glycol
25
30
35
40
45
50
55
Percent Relative Humidity
19
60
65
70
75
Properties
Properties
Figure 12: Refractive Indices of
Figure
12 Glycol
Pure
Triethylene
Refractive Indices of Pure Triethylene Glycol
1.460
1.458
Reactive Index
1.456
1.454
1.452
1.450
1.448
1.446
20
22
24
26
28
30
32
Temperature, ˚C
34
36
38
40
Refractive Index = 1.4626 – 0.000340T
Refractive
Index =°C1.4626 – 0.000340T
T = Temperature,
T = Temperature, °C
20
Properties
Properties
Figure 13: Refractive Indices of
Aqueous
Glycol Solutions at 77°F (25°C)
FigureTriethylene
13
Refractive Indices of Aqueous Triethylene Glycol Solutions at 77°F (25°C)
1.50
1.48
1.46
Reactive Index
1.44
1.42
1.40
1.38
1.36
1.34
1.32
1.30
0
10
20
30
40
50
60
70
80
90
100
Triethylene Glycol, Percent by Weight in Water
Refractive Index,
Index, 77°F
Refractive
77°F (25°C)
(25°C) ==1.3326
1.3326++0.0012403
0.0012403x x
Weight %
xx == Weight
% Triethylene
TriethyleneGlycol
Glycol
21
Properties
Properties
Figure
14: 14
Surface Tensions of
Figure
Pure Triethylene Glycol
Surface Tensions of Pure Triethylene Glycol
Temperature, ˚F
40
46
80
120
160
200
240
280
Surface Tension, dynes/cm
44
42
40
38
36
34
0
50
Temperature, ˚C
100
150
Surface Tension, dynes/cm = 47.330 – 0.088T
Surface Tension, dynes/cm = 47.330 – 0.088T
T = Temperature, °C
T = Temperature, °C
22
Properties
Properties
Figure 15: Surface Tensions of
Figure 15
Aqueous Triethylene Glycol Solutions at 77°F (25°C)
Surface Tensions of Aqueous Triethylene Glycol Solutions at 77°F (25°C)
80
Surface Tension, dynes/cm
70
60
50
40
30
0
10
20
30
40
50
60
70
80
90
100
Triethylene Glycol, Percent by Weight in Water
23
Properties
Properties
Figure 16: Electrical Conductivities of
FigureTriethylene
16
Aqueous
Glycol Solutions
Electrical Conductivities of Aqueous Triethylene Glycol Solutions
12
Electrical Conductivity, micromhoms/cm
10
8
6
4
2
0
0
10
20
70
80
50
60
30
40
Triethylene Glycol, Percent by Weight in Water
90
100
Note: The quality of the water used for dilution can significantly affect
Note: The quality of water used for dilution can significantly affect
the electrical conductivity.
electrical conductivity.
24
Properties
Health and
Environmental Information
Health Effects
See our current Material Safety Data Sheet
for the most current exposure limits, health,
first aid, and toxicology information.
Environmental Information
See our current Material Safety Data Sheet
for current toxicity information.
Biodegradation
For information concerning the biodegradability of triethylene glycol, please refer to
the latest Material Safety Data Sheet.
25
Health and Environmental Information
Storage and
Handling
This information is offered as a guide in
planning bulk storage facilities for glycols.
Glycols are generally considered to be stable,
noncorrosive chemicals with high flash
points. Under ordinary conditions, all of
these chemicals can be stored in mild steel
vessels. For long-term storage, or if trace
iron contamination and the development of
color are objectionable in any of the glycols,
a storage vessel lined with a baked-phenolic
resin, an air-drying epoxy-phenolic resin, or
a vinyl resin or a stainless steel or aluminum
tank is suggested. Zinc or galvanized iron
is not recommended, and copper or copper
alloys may cause product discoloration.
moderately high freezing point or become
relatively viscous at severe winter temperatures. However, excessive temperature can
cause undesirable degradation of glycols.
Automatic controls are suggested to limit the
temperature of the contents to 120°F (49°C).
In cold climates, it is generally desirable
to make provisions for draining the pump
and the transfer lines if they are outside
the building. If this is not feasible, it may
be necessary to insulate and steam trace or
otherwise heat the transfer lines to prevent
freezing of the product. Care must be taken
in such an application, because continued
exposure of glycols to high temperatures,
greater than 120°F (49°C), will result in
product degradation. Transfer piping of
mild steel is generally used.
It is not general practice to use an inert gas
in the vapor space of glycol storage tanks,
because all chemicals in this family have
high boiling points and the vapors in the
tanks are relatively nonflammable. However,
if extremely low water content is required,
consistent with a long storage period, a
nitrogen blanket can be used to exclude
atmospheric moisture and air. Blanketing
with nitrogen will also minimize low-level
oxidation, if necessary for the desired
application. The inert gas prevents air
oxidation in order to maintain product
within acidity specifications. Increased
acidity enhances iron pickup from steel
vessels. Alternatively, a desiccant unit can
be installed on the tank vent line to dry
incoming air.
Shipping Data
Triethylene glycol is not regulated by the U.S.
Department of Transportation; therefore,
it does not have a DOT Shipping Name,
Hazard Classification, DOT Warning Label,
or Identification Number.
Shipping Data For Triethylene Glycol
Weight per Gallon at 20°C
9.36 lb
Coefficient of Expansion at 55°C
0.00072
Flash Point, Pensky-Martens Closed Cup
350°F
Net Contents and Type of Container
If above-ground outside storage is planned,
it may be necessary to install provisions for
heating tanks and lines. Many glycols have a
26
1-Gallon Tin Can
9.0 lb
5-Gallon DOT 17E, Pail
47 lb
55-Gallon DOT 17E, Drum
522 lb
Storage and Handling
Product Safety
When considering the use of triethylene
glycol in any particular application, review
and understand our current Material Safety
Data Sheet for the necessary safety and
health information. For Material Safety
Data Sheets and other product safety
information on Dow products, contact The
Dow Chemical Company sales office nearest
you. Before handling any products mentioned
in this booklet, you should obtain the
available product safety information from
the suppliers of those products and take the
necessary steps to comply with all precautions regarding the use of triethylene glycol.
suitability of the use. Because use conditions
and applicable laws may differ from one
location to another and may change with time,
Customer is responsible for determining
whether products and the information in this
document are appropriate for Customer’s
use and for ensuring that Customer’s workplace and disposal practices are in compliance
with applicable laws and other governmental
enactments.
Dow requests that the customer read,
understand, and comply with the information contained in this publication and the
current Material Data Safety Sheet(s). The
customer should furnish the information in
this publication to its employees, contractors, and customers, or any other users of
the product(s), and request that they do
the same.
No chemical should be used as or in a food,
drug, medical device, or cosmetic, or in a
product process in which it may come in
contact with a food, drug, medical device,
or cosmetic until the user has determined the
27
Product Safety
Emergency Service
The Dow Chemical Company maintains an around-the-clock emergency service for its
products. The Chemical Manufacturers Association (CHEMTREC), Transportation
Canada (CANUTEC), and the Chemical Emergency Agency Service maintain an
around-the-clock emergency service for all chemical products.
Location
Dow Products
All Chemical Products
Phone Dow HELP:
(800) 822-4357 (toll-free)
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(800) 424-9300 (toll-free)
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(703) 527-3887 (collect)
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Phone United States:
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Phone Dow HELP:
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Mainland United States
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Alaska and Hawaii
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DO NOT WAIT. Phone if in doubt. You will be referred to a specialist for advice.
28
Emergency Service
Sales Office
For additional information, contact our
customer service center:
The Dow Chemical Company
2040 Dow Center
Midland, MI 48674
www.dow.com
Phone: (800) 232-2436
29
Sales Office
NOTICE: No freedom from any patent owned by Seller or others is to be inferred. Because use conditions and applicable laws may differ from one
location to another and may change with time, Customer is responsible for determining whether products and the information in this document are
appropriate for Customer’s use and for ensuring that Customer’s workplace and disposal practices are in compliance with applicable laws and
other governmental enactments. Seller assumes no obligation or liability for the information in this document. NO WARRANTIES ARE GIVEN;
ALL IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY EXCLUDED.
Published February 2007
®™Trademark of The Dow Chemical Company (“Dow”) or an affiliated company of Dow
Form No: XXX-0207X CRCG