Product Identification

Product Name

3-Methoxybenzenethiol

Synonyms

(m-Methoxyphenyl)thiol
3-Mercaptoanisole
3-Methoxythiophenol
m-Methoxybenzenethiol
m-Methoxythiophenol

CAS

15570-12-4

Formula

C7H8OS

Molecular Weight

140.21

EINECS

239-617-7

Beilstein/Gmelin

2041496

Beilstein Reference

4-06-00-05701

EC Class

irritant

Physical and Chemical Properties

Appearance

Colorless - very slightly yellow liquid. With a stench.

Solubility in water

Slightly soluble

Boiling Point

223

Density

1.134 g/cm3 (30 C)

pKa/pKb

6.36 (pKa)

Refractive Index

1.5874 (20 C)

First Aid Measures

Ingestion

Get medical aid immediately. Wash mouth out with water.

Inhalation

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

Skin

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

Eyes

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

Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container.

Handling

Avoid breathing dust, vapor, mist, or gas. Avoid contact with skin and eyes. Use only in a chemical fume hood.

Hazards Identification

Ingestion

Harmful if swallowed.

Inhalation

Causes respiratory tract irritation.

Skin

Causes skin irritation.

Eyes

Causes eye irritation.

Hazards

Containers may explode when heated.

EC Risk Phrase

R 20/21/22 36/38

EC Safety Phrase

S 26 36/37/39

UN (DOT)

3082

Exposure Controls/Personal Protection

Personal Protection

Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear a chemical apron.

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

96

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. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical foam.

Fire Potential

May burn but does not ignite readily.

Accidental Release Measures

Small spills/leaks

Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container.

Stability and Reactivity

Incompatibilities

Oxidizing agents, strong bases.

Stability

Stable under normal temperatures and pressures.

Decomposition

Carbon monoxide, oxides of sulfur, carbon dioxide, hydrogen sulfide.

Combustion Products

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

Transport Information

UN Number

3082

Hazard Class

9

Packing Group

III

HS Code

2930 90 70