3-Methoxybenzenethiol

  • m-Methoxybenzenethiol
  • 3-Methoxythiophenol
  • m-Methoxythiophenol
  • 3-Mercaptoanisole
  • (m-Methoxyphenyl)thiol
Formula
C7H8OS
Structure
Description
Colorless - very slightly yellow liquid. With a stench.

Registry Numbers and Inventories.
CAS
15570-12-4
EC (EINECS/ELINCS)
239-617-7
EC Class
irritant
R 20/21/22 36/38
S 26 36/37/39
UN (DOT)
3082
Beilstein/Gmelin
2041496
Beilstein Reference
4-06-00-05701
US TSCA
Listed

Properties.
Formula
C7H8OS
Formula mass
140.21
Boiling point, °C
223
Density
1.134 g/cm3 (30 C)
Solubility in water
Slightly soluble
Refractive index
1.5874 (20 C)
pKa/pKb
6.36 (pKa)

Hazards and Protection.
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.
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.
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Oxidizing agents, strong bases.
Decomposition
Carbon monoxide, oxides of sulfur, carbon dioxide, hydrogen sulfide.

Fire.
Flash Point,°C
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.
Hazards
Containers may explode when heated.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.

Health.
Exposure effects
   Ingestion
Harmful if swallowed.
   Inhalation
Causes respiratory tract irritation.
   Skin
Causes skin irritation.
   Eyes
Causes eye irritation.

First aid
 
   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.

Transport.
UN number
3082
Response guide
Hazard class
9
Packing Group
III
 
HS Code
2930 90 70