Product Identification

Product Name

Triphenylsilanol

Synonyms

Hydroxytriphenylsilane
Triphenylhydroxysilane
Triphenylsilyl hydroxide

CAS

791-31-1

Formula

C18H16OSi

Molecular Weight

276.41000000000003

EINECS

212-339-3

RTECS

VV4325500

RTECS Class

Other

Beilstein/Gmelin

985007

Beilstein Reference

4-16-00-01480

EC Class

irritant

Physical and Chemical Properties

Appearance

White powder.

Solubility in water

Insoluble

Melting Point

150 - 153

Vapor Pressure

7.5 (20 C)

Density

1.205 g/cm3

pKa/pKb

13.39 (pKa)

First Aid Measures

Ingestion

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

Inhalation

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

Skin

Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse.

Eyes

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

Handling and Storage

Storage

Store in a tightly closed container. Store protected from moisture. Store in a cool, dry area away from incompatible substances.

Handling

Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Avoid contact with eyes, skin, and clothing. Keep container tightly closed. Avoid ingestion and inhalation. Use with adequate ventilation. Do not allow contact with water. Wash clothing before reuse. Keep from contact with moist air and steam.

Hazards Identification

Inhalation

Causes respiratory tract irritation. The toxicological properties of this substance have not been fully investigated. Can produce delayed pulmonary edema.

Skin

Causes skin irritation.

Eyes

Causes eye irritation. May cause chemical conjunctivitis.

Ingestion

May cause gastrointestinal irritation with nausea, vomiting and diarrhea. The toxicological properties of this substance have not been fully investigated.

EC Risk Phrase

R 36/37/38

EC Safety Phrase

S 26 36

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.

Respirators

A respiratory protection program that meets OSHA's 29 CFR 1910.134 and ANSI Z88.2 requirements or European Standard EN 149 must be followed whenever workplace conditions warrant a respirator's use.

Exposure Effects

Effects may be delayed.

Fire Fighting Measures

Autoignition

535

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Extinguishing media: Do NOT get water inside containers. In case of fire, use carbon dioxide, dry chemical powder or appropriate foam.

Accidental Release Measures

Small spills/leaks

Clean up spills immediately, using the appropriate protective equipment. Sweep up, then place into a suitable container for disposal. Provide ventilation. Do not get water inside containers.

Stability and Reactivity

Disposal Code

3

Stability

Stable at room temperature in closed containers under normal storage and handling conditions. Moisture sensitive.

Incompatibilities

Strong oxidizing agents, moisture.

Decomposition

Carbon monoxide, carbon dioxide, silicon oxide, acrid smoke and fumes.

Transport Information

HS Code

2931 00 95