Product Identification

Product Name

Triethoxysilane

Synonyms

TRIES

CAS

998-30-1

Formula

C6H16O3Si

Molecular Weight

164.31

EINECS

213-650-7

RTECS

VV6682000

RTECS Class

Other

Beilstein/Gmelin

1738989

Beilstein Reference

4-01-00-01359

Physical and Chemical Properties

Solubility in water

Insoluble

Melting Point

-170

Boiling Point

135

Vapor Pressure

10 (25 C)

Density

0.8753 g/cm3 (20 C)

Partition Coefficient

4.7

Heat Of Vaporization

35.6 kJ/mol

Usage

Is of commercial importance in the silane and silicone industry for the production of organofunctional coupling agents, low-temperature-vulcanizing (ltv) silicone rubbers and elastomers, and specialty monomers.

Refractive Index

1.3785 (20 C)

First Aid Measures

Ingestion

Seek medical attention. If individual is drowsy or unconscious, do not give anything by mouth; place individual on the left side with the head down. Contact a physician, medical facility, or poison control center for advice about whether to induce vomiting. If possible, do not leave individual unattended.

Inhalation

If symptoms develop, move individual away from exposure and into fresh air. If symptoms persist, seek medical attention. If breathing is difficult, administer oxygen. Keep person warm and quiet; seek immediate medical attention.

Skin

Remove contaminated clothing. Wash exposed area with soap and water. If symptoms persist, seek medical attention. Launder clothing before reuse.

Eyes

If symptoms develop, immediately move individual away from exposure and into fresh air. Flush eyes gently with water for at least 15 minutes while holding eyelids apart; seek immediate medical attention.

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

See inhalation.

Inhalation

Toxicity is similar to silanes. Silanes are moderately irritating to skin, eyes, and mucous membranes. Silane compounds are toxic.

Skin

See inhalation.

Eyes

See inhalation

Hazards

When heated to decomposition, it emits acrid smoke and fumes.

EC Risk Phrase

R 10 21/22 26 36/37/38 41

EC Safety Phrase

S 16 26 36/37/39 45

UN (DOT)

2929

Exposure Controls/Personal Protection

Personal Protection

Chemical splash goggles in compliance with OSHA regulations are advised; however, OSHA regulations also permit other type safety glasses. Whre chemical resistant gloves. To prevent repeated or prolonged skin contact, wear impervious clothing and boots.

Respirators

Use NIOSH/MSHA approved respirator appropriate for exposure of concern.

Fire Fighting Measures

Flash Point

26

Fire Fighting

(Non-Specific -- Poisonous Liquid, n.o.s.) Keep unnecessary people away; isolate hazard area and deny entry. Stay upwind; keep out of low areas. Ventilate closed spaces before entering them. Wear positive pressure breathing apparatus and special protective clothing. Remove and isolate contaminated clothing at the site. Move container from fire area if you can do so without risk. Fight fire from maximum distance. Dike fire control water for later disposal; do not scatter the material.(Non-Specific -- Poisonous Liquid, n.o.s.) Small fires: dry chemical, carbon dioxide, water spray, or foam. Large fires: water spray, fog, or foam.

Accidental Release Measures

Small spills/leaks

(Non-Specific -- Poisonous Liquid, n.o.s.) Keep unnecessary people away; isolate hazard area and deny entry. Stay upwind; keep out of low areas. Ventilate closed spaces before entering them. Remove and isolate contaminated clothing at the site. Do not touch spilled material; stop leak if you can do so without risk. Use water spray to reduce vapors. Small spills: absorb with sand or other noncombustible absorbent material and place into containers for later disposal. Large spills: dike far ahead of spill for later disposal.

Stability and Reactivity

Stability

No data.

Transport Information

UN Number

2929