Product Identification

Product Name

Trimethoxysilane

Synonyms

Silane, trimethoxy-

CAS

2487-90-3

Formula

C3H10O3Si

Molecular Weight

122.22

EINECS

219-637-2

RTECS

VV6750000

RTECS Class

Primary Irritant

Beilstein/Gmelin

1697990

Beilstein Reference

4-01-00-01266

Physical and Chemical Properties

Appearance

A colorless liquid.

Solubility in water

Decomposes.

Melting Point

-114.8

Boiling Point

81 - 83

Vapor Pressure

76

Density

0.9601 g/cm3

Heat Of Vaporization

36.77 kJ/mol

Usage

Used to prepare a number of organic coupling agents utilized by the plastics industry as adhesion promotors.

Vapor Density

>1

Refractive Index

1.359 (20 C)

First Aid Measures

Ingestion

Seek medical assistance.

Inhalation

Move patient to fresh air. Monitor for respiratory distress. If cough or difficulty breathing develops, evaluate for respiratory tract irritation, bronchitis, or pneumonitis. Administer oxygen and assist ventilation as required. Treat bronchospasm with beta2 agonist and corticosteroid aerosols.

Skin

Remove contaminated clothing and wash exposed area thoroughly with soap and water. A physician should examine the area if irritation or pain persists.

Eyes

Irrigate exposed eyes with copious amounts of tepid water for at least 15 minutes. If irritation, pain, swelling, lacrimation, or photophobia persist, the patient should be seen in a health care facility.

Handling and Storage

Storage

Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.

Handling

All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.

Hazards Identification

Ingestion

May cause toxic effects.

Inhalation

Respiratory tract irritation may be seen.

Skin

Contact with substance may cause severe burns.

Eyes

See Skin.

Hazards

May be ignited by heat, sparks or flames. Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers. May polymerize explosively when heated or involved in a fire. Runoff to sewer may create fire or explosion hazard. Containers may explode when heated. Many liquids are lighter than water.

UN (DOT)

9269

Exposure Controls/Personal Protection

Personal Protection

Wear appropriate protective gloves, clothing and goggles.

Respirators

Wear positive pressure self-contained breathing apparatus (SCBA).

Poison Class

5

Fire Fighting Measures

Flash Point

-4

Fire Fighting

Use water in flooding quantities as fog. Use foam, dry chemical, or carbon dioxide. Keep run-off water out of sewers and water sources. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible.

Fire Potential

Flammable/combustible material.

Accidental Release Measures

Small spills/leaks

Keep sparks, flames, and other sources of ignition away. Keep material out of water sources and sewers. Build dikes to contain flow as necessary. Attempt to stop leak if without undue personnel hazard.

Stability and Reactivity

Stability

No data.

Combustion Products

Fire will produce irritating, corrosive and/or toxic gases.

Transport Information

UN Number

9269

Hazard Class

6.1

Packing Group

I