Product Identification

Product Name

Propyltrichlorosilane

Synonyms

Trichloro(propyl)silane
Trichloropropylsilane

CAS

141-57-1

Formula

C3H7Cl3Si

Molecular Weight

177.53

EINECS

205-489-6

RTECS

VV5300000

Beilstein/Gmelin

1734990

Beilstein Reference

4-04--00-04239

Physical and Chemical Properties

Appearance

A colorless liquid with a pungent odor.

Boiling Point

123.5

Vapor Pressure

29 (25 C)

Density

1.195 g/cm3 (20 C)

Heat Of Vaporization

36.43 kJ/mol

Usage

Intermediate for silicones.

Vapor Density

6.12

Refractive Index

1.4310 (20 C)

First Aid Measures

Ingestion

Dilution: immediately dilute with 4 to 8 ounces (120 to 240 ml) of milk or water (not to exceed 4 ounces/120 ml in a child). Do not induce vomiting.

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, wash exposed area with copious amounts of 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

Store in a cool, dry location in a tightly sealed container. Corrosives area.

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

Gastrointestinal tissue corrosion was observed in animals given single oral doses and may occur in humans following ingestion.

Inhalation

Three cases of permanently disabling reactive airway syndrome have been reported in adults exposed for several hours to fumes of sodium hydroxide, trichlorosilane, and silicon tetrachloride.

Skin

The application of chlorosilanes to shaved rabbit skin produced various degrees of irritation. Complete denaturation and tissue sloughing occurred within one minute after exposure to dichlorodimethylsilane, within two to three minutes after exposure to methyltrichlorosilane, ethyltrichlorosilane, and dichlorodiethylsilane, and within 10 minutes after exposure to tetrachlorosilane.

Eyes

See Inhalation.

Hazards

Vapors form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapors may travel to source of ignition and flash back. Substance will react with water (some violently) releasing flammable, toxic or corrosive gases and runoff. Contact with metals may evolve flammable hydrogen gas. Containers may explode when heated or if contaminated with water.

EC Risk Phrase

R 10 14 34

EC Safety Phrase

S 26 36/37/39 45

UN (DOT)

1816

Exposure Controls/Personal Protection

Personal Protection

Wear protective gloves and clothing and safety goggles.

Respirators

Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.

Fire Fighting Measures

Flash Point

40

Fire Fighting

Use dry chemical, dry sand, or carbon dioxide. Do not use water on material itself. If large quantities of combustibles are involved, use water in flooding quantities as spray and fog. Use water spray to knock-down vapors. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible.

Fire Potential

HIGHLY FLAMMABLE.

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. Use water spray to knock-down vapors. Do not use water on material itself. Neutralize spilled material with crushed limestone, soda ash, or lime. Land spill: Dig a pit, pond, lagoon, holding area to contain liquid or solid material. Dike surface flow using soil, sand bags, foamed polyurethane, or foamed concrete. Absorb bulk liquid with fly ash, cement powder, or commercial sorbents. Water spill: Use natural barriers or oil spill control booms to limit spill travel. Remove trapped material with suction hoses.

Stability and Reactivity

Stability

No data.

Incompatibilities

Reacts violently with water, steam, moist air, alcohols, acetone, and light metals with generation of heat and flammable (H2) and corrosive (HCl) gases.

Combustion Products

Emits toxic fumes.

Transport Information

UN Number

1816

Hazard Class

8

Packing Group

II