Product Identification

Product Name

Trimethoxysilylpropanethiol

Synonyms

3-(Sulfanylpropyl)trimethoxysilane
3-(Trimethoxysilyl)-1-propanethiol
3-(Trimethoxysilyl)propyl mercaptan
Dynasylan NTNS
Prosil 196
Silquest A 189

CAS

4420-74-0

Formula

C6H16O3SSi

Molecular Weight

196.34

EINECS

224-588-5

RTECS

TZ7800000

RTECS Class

Organometallic; Primary Irritant

Beilstein/Gmelin

2038119

EC Class

harmful, sensitizing, dangerous for the environment

Physical and Chemical Properties

Appearance

Clear, colorless liquid. With a stench.

Solubility in water

Slightly soluble

Melting Point

-50

Boiling Point

215

Vapor Pressure

0.52 (25 C)

Density

1.056 g/cm3

pKa/pKb

10.55 (pKa)

Partition Coefficient

1.09

Heat Of Vaporization

41.6 kJ/mol

Usage

Coupling agent.

Vapor Density

6.77

Refractive Index

1.4441 (20 C)

First Aid Measures

Ingestion

Never give anything by mouth to an unconscious person. Get medical aid immediately. 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. 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 immediately.

Handling and Storage

Storage

Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances. Store protected from moisture.

Handling

Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid contact with heat, sparks and flame. Avoid ingestion and inhalation. Do not allow contact with water. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames. Keep from contact with moist air and steam.

Hazards Identification

Ingestion

May cause gastrointestinal irritation with nausea, vomiting and diarrhea.

Inhalation

Aspiration may lead to pulmonary edema. Inhalation at high concentrations may cause CNS depression and asphixiation.

Skin

Causes mild skin irritation. May cause dermatitis. May cause cyanosis of the extremities.

Eyes

May cause eye irritation. May cause chemical conjunctivitis and corneal damage.

EC Risk Phrase

R 22 51/53

EC Safety Phrase

S 28 36/37 60 61

UN (DOT)

3082

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.

Poison Class

4

Fire Fighting Measures

Flash Point

49

Autoignition

235

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. Use water spray to keep fire-exposed containers cool. Combustible Liquid. Extinguishing media: Use water spray to cool fire-exposed containers. Do NOT get water inside containers. In case of fire, use carbon dioxide, dry chemical powder or appropriate foam.

Upper exp. limit

44

Lower exp. limit

5.5

Accidental Release Measures

Small spills/leaks

Remove all sources of ignition. Absorb spill using an absorbent, non-combustible material such as earth, sand, or vermiculite. Use a spark-proof tool. Provide ventilation. Do not get water inside containers.

Stability and Reactivity

Disposal Code

6

Stability

Stable under normal temperatures and pressures. Moisture sensitive.

Incompatibilities

Strong oxidizing agents, strong acids, alcohols, moisture, water.

Decomposition

Carbon monoxide, oxides of sulfur, carbon dioxide, silicon oxide.

Transport Information

UN Number

3082

HS Code

2931 00 95