GPS SAFETY REPORT
N-(3-(trimethoxysilyl)propyl)ethylenediamine
This document is a high-level summary intended to provide the general public with an overview of
product safety for this substance. It is not intended to replace the Safety Data Sheet or legally
required safety information, which is available from Dow Corning and should be referred to for full
details of recommended safety procedures for each type of use. Where there is any inconsistency
in the information provided herein and the Safety Data Sheet/legally required information, the
latter shall prevail.
1. Substance Name and Chemical Identity
Chemical Name:
N-(3-(trimethoxysilyl)propyl)ethylenediamine
CAS Number:
1760-24-3
Molecular formula:
C8H22N2O3Si
2. Uses and Applications
N-(3-(trimethoxysilyl)propyl)ethylenediamine is an alkoxysilane that has the following uses:
•
Use as a monomer (‘building block’) in the production of silicone polymers or silicone
resins. Silicone polymers may be oils, greases and rubbers and have a wide range of uses.
•
Intermediate (starting material) in the production of other organosilicon substances;
•
Use in sealants and coatings
•
Use in the production of surface-modified particles or substrates (non-metal surface
treatment)
•
Use in non-polymer preparation
•
Use in masonry treatment
•
Laboratory reagent in research and development activities
Most of the applications described take place in industrial settings under controlled conditions. The
end uses of products made N-(3-(trimethoxysilyl)propyl)ethylenediamine will vary.
In coatings, N-(3-(trimethoxysilyl)propyl)ethylenediamine offers improved hardness and scratch-,
temperature- solvent and acid-resistance. Examples of typical industrial uses are automotive
refinishing and coating of beverage cans. Professional and consumer uses include paints, wood and
metal primers and stains and varnishes. In sealants N-(3-(trimethoxysilyl)propyl)ethylenediamine
is used as a cross-linking agent and an adhesion promoter during sealant manufacture and sealant
application. The use of sealants is widespread with various industrial, professional and consumer
end uses, including construction and automotive industry.
N-(3-(trimethoxysilyl)propyl)ethylenediamine is also used in non-metal surface treatment and
masonry, the uses exploiting the cross-linking capacity of the substance.
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3. Physical/chemical properties
N-(3-(trimethoxysilyl)propyl)ethylenediamine is a liquid at standard temperature and pressure.
When in contact with water, the substance reacts very rapidly to produce N-[3(trihydroxysilyl)propyl]ethylenediamine
and
methanol.
N-(3(trimethoxysilyl)propyl)ethylenediamine is not classified for physicochemical hazards under the
Globally Harmonised System (GHS).
Property
Value
Physical state
Liquid
Colour
Clear/yellow
Odour
None reported
Molecular weight
222.36 g/mol
Melting/boiling point
< -20°C / 240°C
Density
1.03 g/cm3 at 20°C
Vapour pressure
0.3-0.4 Pa at 20°C
Flammability
Not flammable
Flash point
98°C at 1013 hPa
Self-ignition temperature
300-301°C at 1013 hPa
Explosive properties
Not explosive
4. Health information
N-(3-(trimethoxysilyl)propyl)ethylenediamine is classified for human health effects under the
Globally Harmonised System (GHS) as:
Acute Toxicity Category 4
H332: Harmful if inhaled
Eye Damage Category 1
H318: Causes serious eye damage
Skin Sensitiser Category 1B
H317: May cause an allergic skin reaction
5. Environmental information
N-(3-(trimethoxysilyl)propyl)ethylenediamine is not classified for environmental effects under the
Globally Harmonised System (GHS).
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6. Exposure potential
Consumer and Professional exposure: Use of coating and sealant products containing N-(3(trimethoxysilyl)propyl)ethylenediamine by professionals in building construction, furniture
coating, decorative coating and vehicle refinishing are representative of exposure to professional
exposure. N-(3-(trimethoxysilyl)propyl)ethylenediamine is rarely used in water based decorative
coating products meant for the DIY consumer market. In the few cases where it is used, the
substance is invariably no longer present in its original form due to a hydrolysis reaction and
therefore its end-use in aqueous coating products does not pose an exposure risk to consumers.
N-(3-(trimethoxysilyl)propyl)ethylenediamine is also present in some solvent based DIY-coatings,
but the frequency of use is expected to be low and once the coating has been applied and has set,
there is no further potential for consumer exposure. In sealants, the parent material is negligible
at end use. . Regardless of the end use of the coating/sealant the application techniques by
consumers and professionals are similar. Masonry products formulated with N-(3(trimethoxysilyl)propyl)ethylenediamine for masonry treatment in building construction and
maintenance, by spraying, injection or roller application are also used by professionals and
consumers.
Workplace exposure: This refers to potential for worker exposure at manufacturing sites or
industrial workplaces. Industrial uses include coatings and masonry products formulated with N(3-(trimethoxysilyl)propyl)ethylenediamine, the application of which is typically by spraying,
dipping and roll or flow-coating. All aspects of N-(3-(trimethoxysilyl)propyl)ethylenediamine
handling, including on-site storage and transfer of the neat substance, are subject to highly
controlled conditions, due to its flammability hazard. Further details are given in the Safety Data
Sheet.
Environmental releases: Releases to the environment can vary depending on the industry and
processes used. However, manufacturing occurs under controlled conditions, with minimal releases
to air and waste water. Environmental exposure is minimised by applying air and waste water
abatement technologies to remove unreacted substance and reaction products. The use of
appropriate measures to manage environmental release is described in the Safety Data Sheet.
7. Risk management recommendations
Consumer and professional risk management: Adequate ventilation and protective clothing
such as rubber type gloves are essential to professional risk management. Masonry products must
contain a maximum of 5%-10% of the substance or be diluted to this concentration for safe use of
the product by consumers, without additional PPE. Consumers using coatings and sealants should
follow the supplier’s/manufacturer’s instructions.
Industrial risk management: For more detailed information please refer to the safety data
sheet for information on protecting workers and limiting environmental exposure at industrial sites.
In summary, when using this chemical, there must be adequate ventilation. Suitable respiratory
protection must be worn if the product is handled in large quantities in confined spaces, chemicalresistant clothing and gloves, and safety glasses or other suitable eye protection must be worn.
Keep containers tightly closed, in a dry and cool place. In a laboratory setting, local exhaust
ventilation must be in place and personal protective equipment must be worn with adherence to
good laboratory practice.
8. Conclusions
N-(3-(trimethoxysilyl)propyl)ethylenediamine is used under controlled conditions at industrial sites
and in consumer applications it does not pose risk to human health if instructions for use are
followed. It is therefore concluded that the manufacturing and use of N-(3(trimethoxysilyl)propyl)ethylenediamine does not pose a risk to humans or the environment if
instructions in the Safety Data Sheet are followed.
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9. Contact Information
For further information on this substance or product safety summaries in general, please contact:
Dow Corning EH&S Team
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