Product Identification

Product Name

Methyltrichlorosilane

Synonyms

[5-(Benzoylperoxy)-2,5-dimethylhexan-2-yl] benzenecarboperoxoate
2,5-Dimethyl-2,5-hexanedihydroperoxide dibenzoate
2,5-Dimethylhexane-2,5-diyl diperbenzoate
Benzenecarboperoxoic acid, 1,1,4,4-tetramethyl-1,4-butanediyl ester
Kayaester AB
Luperox 118
Perhexa 25Z
Trichloro(methyl)silane
Trichloromethylsilane

CAS

2618-77-1

CAS

75-79-6

Formula

C22H26O6

Formula

CH3Cl3Si

Molecular Weight

386.44

Molecular Weight

149.47999999999999

EINECS

200-902-6

EINECS

220-050-9

RTECS

VV4550000

RTECS Class

Primary Irritant

Beilstein/Gmelin

1361381

Beilstein/Gmelin

3451013

Beilstein Reference

3-09-00-01050

Beilstein Reference

4-04-00-04212

EC Index Number

014-004-00-5

EC Class

Reacts violently with water; Highly flammable; Irritant

Physical and Chemical Properties

Appearance

A colorless fuming liquid with a pungent odor.

Appearance

It is generally stored or transported as a mixture, with an inert solid.

Solubility in water

Decomposes

Solubility in water

Insoluble

Melting Point

-90

Melting Point

117

Boiling Point

66

Vapor Pressure

167

Density

1.27 g/cm3 (20 C)

Partition Coefficient

4.19

Heat Of Vaporization

30.2 kJ/mol

Heat Of Combustion

-1014 kJ/mol

Usage

Intermediate for silicones.

Vapor Density

5.17

Odor threshold

as hydrochloric acid - 1 ppm

Refractive Index

1.412 (20 C)

First Aid Measures

Ingestion

Do NOT induce vomiting. If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid. Wash mouth out with water.

Ingestion

Seek medical assistance.

Inhalation

Causes irritation.

Inhalation

Move victim to fresh air. Apply artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult.

Inhalation

Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.

Skin

May cause severe injury or burns.

Skin

Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.

Skin

Remove and isolate contaminated clothing and shoes. Remove material from skin immediately. Immediately flush with running water for at least 20 minutes.

Eyes

See Skin.

Eyes

Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Eyes

Immediately flush with running water for at least 20 minutes.

Handling and Storage

Storage

Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container. Keep under a nitrogen blanket. Flammables-area.

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

Use spark-proof tools and explosion proof equipment. Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes. Do not allow contact with water. Use only in a chemical fume hood.

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

Aspiration hazard. May be harmful if swallowed.

Ingestion

See Skin.

Inhalation

Causes respiratory tract irritation. Inhalation may be fatal as a result of spasm, inflammation, edema of the larynx and bronchi, chemical pneumonitis and pulmonary edema.

Skin

Causes severe skin irritation. Harmful if absorbed through the skin. Substance is rapidly absorbed through the skin. Causes redness and pain.

Eyes

Causes severe eye irritation. May cause blindness. Causes redness and pain.

Hazards

May explode from heat, shock, friction or contamination. May ignite combustibles (wood, paper, oil, clothing, etc.). May be ignited by heat, sparks or flames. May burn rapidly with flare-burning effect. Containers may explode when heated. Runoff may create fire or explosion hazard.

Hazards

Toxic hydrogen chloride and phosgene gases may form in fires. Reacts with water or steam to form hydrochloric acid. Vapor forms flammable mixture with air. May form explosive mixture in air. Avoid contact with water or moist air.

EC Risk Phrase

R 11 14 36/37/38

EC Safety Phrase

S 26 39

UN (DOT)

1250

UN (DOT)

2172

UN (DOT)

2173

Exposure Controls/Personal Protection

Personal Protection

Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.

Personal Protection

Wear appropriate protective gloves, clothing and goggles.

Respirators

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

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.

Poison Class

3

Fire Fighting Measures

Flash Point

-15

Autoignition

> 500

Fire Fighting

SMALL FIRES: Water spray or fog is preferred; if water not available use dry chemical, carbon dioxide or regular foam. LARGE FIRES: Flood fire area with water from a distance. Use water spray or fog; do not use straight streams. Move containers from fire area if you can do it without risk. Do not move cargo or vehicle if cargo has been exposed to heat. Fight fire from maximum distance or use unmanned hose holders or monitor nozzles. Cool containers with flooding quantities of water until well after fire is out. ALWAYS stay away from tanks engulfed in fire. For massive fire, use unmanned hose holders or monitor nozzles; if this is impossible, withdraw from area and let fire burn.

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Will burn if involved in a fire. Containers may explode in the heat of a fire. Extinguishing media: Use water spray to cool fire-exposed containers. Use foam, dry chemical, or carbon dioxide. DO NOT USE WATER!

Upper exp. limit

10.4

Lower exp. limit

5.5

Fire Potential

HIGHLY FLAMMABLE: Will be easily ignited by heat, sparks or flames.

Fire Potential

May be ignited by heat, sparks or flames. May burn rapidly with flare-burning effect.

Accidental Release Measures

Small spills/leaks

Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Remove all sources of ignition. Use a spark-proof tool.

Small spills/leaks

ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area). Keep combustibles (wood, paper, oil, etc.) away from spilled material. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Keep substance wet using water spray. Stop leak if you can do it without risk. SMALL SPILLS: Take up with inert, damp, noncombustible material using clean non-sparking tools and place into loosely covered plastic containers for later disposal.

Stability and Reactivity

Stability

No data.

Incompatibilities

Organic compounds can ignite on contact with concentrated peroxides, strongly reduced material such as sulfides, nitrides, and hydrides

Incompatibilities

Strong acids - strong bases - strong oxidizing agents - alcohols - chemically active metals (potassium, magnesium, sodium, zinc) - alkalis.

Stability

Unstable.

Disposal Code

24

Decomposition

Hydrogen chloride, phosgene, carbon monoxide, carbon dioxide, silicon oxide.

Combustion Products

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

Combustion Products

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

Transport Information

UN Number

1250

UN Number

2172

UN Number

2173

Hazard Class

3

Hazard Class

5.2

Packing Group

I

HS Code

2931 00 95