Chemical Compatibility of Ozone with Other Materials
The following table displays the compatibility of Ozone with a wide variety of materials. Please feel free to
contact Ozone Efficiency with questions concerning Ozone material compatibility.
Ratings – Chemical Effect
1. A = Excellent
2. B = Good – Minor effect, slight corrosion or discoloration.
3. C = Fair – Moderate effect, not recommended for continuous use.
4. Severe Effect – Not recommended for any use.
Material
Compatibility
304 stainless steel
B-Good
316 stainless steel
A-Excellent
ABS plastic
B-Good
Polyoxymethylene (Delrin)
C-Good
Aluminium
B-Good
Brass
N/A
Bronze
B-Good
Buna N (Nitrile Rubber)
D-Severe Effect
Carbon graphite
N/A
Carbon Steel
C-Fair
Carpenter 20
N/A
Cast iron
N/A
Ceramic Al203
N/A
Ceramic magnet
N/A
ChemRaz (FFKM)
B-Good
Copper
A-Excellent
CPVC
A-Excellent
EPDM
A-Excellent
Epoxy
N/A
Fluorocarbon (FKM)
A-Excellent
Hastelloy-Cr
N/A
Hypalonr
A-Excellent
Hytrelr
C-Fair
Kalrez
A-Excellent
Kel-Fr
A-Excellent
LDPE
C-Fair
Natural rubber
D-Severe Effect
Neoprene
C-Fair
NORYLr
N/A
Nylon
D-Severe Effect
Polycarbonate
A-Excellent
Polyetherether Ketone (PEEK)
A-Excellent
Polypropylene
B-Good
Polyurethane
A-Excellent
PPS (Rytonr)
N/A
PTFE (Teflonr)
A-Excellent
PVC
B-Good
PVDF (Kynarr)
A-Excellent
Silicone
A-Excellent
Titanium
N/A
Tygonr
N/A
Vitonr
A-Excellent
Ozone Solubility in Water (Saturation) Versus Temperature
Celsius
Fahrenheit
Grams/litre
ppm
0
32.0
0.0394
39.4
12
53.6
0.299
29.9
19
66.2
0.21
21.0
27
80.6
0.0139
13.9
40
104
0.0042
4.2
60
140
0.0
0.0
Source: CRC Handbook of Chemistry and Physics
180th Edition 2001
David Lide, Editor
Published by CRC Press
Ozone Half Life vs. Temperature
Typical Ozone Half-Life vs. Temperature
Gaseous Ozone
Temp(C)
-50
-35
-25
20
120
250
Half-Life
3 months
18 days
8 days
3 days
1.5 hours
1.5 seconds
Ozone Dissolved in Water (pH 7)
Temp (C)
15
20
25
30
35
35
Half-Life
30 minutes
20 minutes
15 minutes
12 minutes
8 minutes
8 minutes
These values are based on thermal decomposition, no wall effects or other catalytic (reaction) effects are considered.
Properties of Ozone
Typical Ozone Half-Life vs. Temperature
Property
Ozone
Oxygen
Molecular Formula:
O3
O2
Molecular Weight:
48
32
Colour:
Light Blue
Colourless
Smell:
Characteristic Odour
Odourless

Clothes after being outside on
clothesline.

Photocopy machines.

Smell after lightning storms.
Solubility in Water (@ O-deg C):
0.64
0.049
Density (g/l):
2.144
1.429
Electrochemical Potential, V:
2.07
1.23
MSDS
Material Safety Data Sheet
Ozone
Section 1: Material Identification
Identity: Ozone (Triatomic Oxygen) Formula: O3
Description:
Ozone is naturally formed in the environment from the interaction of UV light and lightning with atmospheric
oxygen. Ozone is commercially produced by passing air or oxygen through high voltage. It is also created as a
by-product of human activities such as welding, copy equipment, high voltage equipment, and UV radiation.
As a gas, ozone is a powerful oxidizing agent and highly reactive. Ozone uses include air and water disinfection,
microbial control (fungi, yeast, bacteria, etc.), bleaching, and as an oxidizing agent in manufacturing and waste
disposal processes.
Exposure to ozone gas can produce respiratory complications from minor irritation to pulmonary-oedema, eye
irritation, and affect the blood and nervous system.
Section 2: Health Hazard Identification
NIOSH RTECS Number: RS8225000
OSHA PEL:
ACGIH TLV:
NIOSH REL:
IDLH:
CAS Number: 10028-15-6
8-hour TWA: 0.1 ppm (0.2 mg/m3)15-minute STEL: 0.3 ppm
(0.6 mg/m3)
Ceiling – 0.1 ppm (0.2 mg/m3)
Ceiling – 0.1 ppm (0.2 mg/m3)
10 ppm
CAUTION! Olfactory fatigue develops rapidly and odour should not be used as a protective warning device.
Section 3: Physical Data
Boiling Point:
-170o F (-112o C)
Melting Point:
-313o F (-193o C)
Vapor Pressure:
> 1 atm
Vapor Density:
2.114 (Air = 1)
Solubility in Water:
0.5 ml in 100 gallons at 0o C 30 ppm at 20o C
pH:
Not Available
Appearance and Odour:
Colourless gas with characteristic pungent odour.
Section 4: Fire and Explosion Hazard
Flash Point:
Non Flammable
Auto Ignition Temp.:
Non Applicable
Special Fire Fighting
Ozone is an oxidizer, use media appropriate for surrounding materials.
Procedure:
Unusual Fire and Explosion Can react dangerously in high concentrations with aniline, C6H6,
Hazards:
Br2, diethyl ether, N2O2, ethylene, HB, HI, NO2, NO, NCl, nitro-glycerine,
organic liquids, organic matter, and Sn (Tin).
Section 5: Reactivity Data
Stability:
Unstable
Reactivity:
Reacts with any oxidizable materials, both organic and inorganic.
Conditions to Avoid:
Avoid strong reducing agents, combustible materials (i.e. grease,
oils, fats, etc.), and ignition sources (i.e. heat, sparks, open flame).
Hazardous Decomposition: Ozone rapidly decomposes to oxygen.
Section 6: Health Hazard Data
Carcinogenicity:
Ozone is not listed as a carcinogen by the NTP, IARC, or OSHA.
Routes of Entry:
Eyes and inhalation are the primary routes of entry.
Target Organs:
Respiratory system, eyes and blood.
Acute Effects:
Occurs primarily from the oxidation of tissue.
Chronic Effects:
Respiratory disease.
Medical Restrictions:
History of respiratory or heart disease. Persons with Asthma or
Emphysema may be further aggravated by exposure to Ozone.
Concentration (ppm)
0.01 – 0.04 ppm
0.1 ppm
>0.1 ppm
0.25 – 0.5 ppm
Duration of Exposure
N/A
N/A
Few minutes.
2-5 hours.
>0.4 ppm
2 hours.
>0.6 ppm
1 ppm
>1.5 ppm
2 hours.
1 – 2 hours.
2 hours.
Effect
Odor Threshold
Minor eye, nose and throat irritation.
Continuous headache, shortness of breath.
Reduction in lung function and the
ability to do physical work (for persons
with a history of heart and lung disease).
Reduction in lung function during
moderate work for all persons.
Chest pain, dry cough.
Lung irritation (coughing), severe fatigue.
Reduced ability to think clearly.
Continuing cough and extreme tiredness
maybe lasting for 2 weeks. Severe lung
9 ppm
10 ppm
11 ppm
50 ppm
Section 7: First Aid Measures
Inhalation:
irritation with fluid build-up.
Intermittent
Severe pneumonia (arc welders).
Immediate Danger to Life and Health!
15 minutes.
Rapid unconsciousness.
30 minutes.
Expected to be fatal.
Remove from area to fresh air and administer oxygen as needed.
Seek medical attention.
Eyes:
Remove from area and flush eyes continuously for at least
15 minutes with water. Seek medical attention.
Skin:
Not applicable.
Ingestion:
Not applicable.
Section 8: Precautions for Safe Handling and Use
Employee Protection:
Respiratory Protection:
0.2 – 10 ppm – Canister type (carbon)
respirators.
>10 ppm – MISH/NIOSH approved Self
Contained Breathing Apparatus (SCBA).
Eye Protection:
>10 ppm – Chemical safety goggles.
Engineering Controls:
Provide workplace engineering controls adequate to maintain ozone
gas levels below recommended OSHA/ACGIH exposure limits.
Such controls may include but are not limited to the following:
1. Develop standard workplace practices and emergency procedures to be
adhered to when working with ozone.
2. Provide employees training in equipment operation, safety and emergency
procedures.
3. Provide adequate workplace ventilation systems.
4. Utilize appropriate instrumentation to monitor and control ozone levels
in the workplace (i.e. ambient ozone monitor(s), alarms, generator
controls, etc.).
Spill/Leak Procedures:
Emergency procedures should be developed and followed in the
event of a spill/leak. Appropriate personal protective equipment
should be available and utilized. All applicable laws and regulations
as well as OSHA requirements should be followed.
Waste Disposal / Storage: Ozone gas rapidly decomposes to form oxygen and cannot be stored. Follow HSE
Advice/regulations.