3-Mercaptophenol

  • 3-Hydroxybenzenethiol
  • 3-Hydroxyphenylmercaptan
  • m-Hydroxybenzenethiol
  • Monothioresorcinol
  • m-Mercaptophenol
  • 3-Hydroxythiophenol
Formula
C6H6OS
Structure

Registry Numbers and Inventories.
CAS
40248-84-8
UN (DOT)
3334
Beilstein Reference
2-06-00-00827

Properties.
Formula
C6H6OS
Formula mass
126.18
Melting point, °C
16.5
Boiling point, °C
242 - 243
Vapor pressure, mmHg
0.01 (25 C)
Critical temperature
495
Critical pressure
63.2
Density
1.237 g/cm3 (25 C)
Solubility in water
2.4 g/L
Refractive index
>1.629 (20 C)
pKa/pKb
6.50 (pKa)
Partition coefficient, pKow
1.81
Heat of vaporization
51.37 kJ/mol

Hazards and Protection.
Protection
Compatible chemical-resistant gloves. Chemical safety goggles. Protective clothing.
Respirators
Use respirators and components tested and approved under appropriate government standards such as NIOSH (US) or CEN (EU). Where risk assessment shows air-purifying respirators are appropriate use a full-face respirator with multi-purpose combination (US) or type ABEK (EN 14387) respirator cartridges as a backup to engineering controls. If the respirator is the sole means of protection, use a full-face supplied air respirator.
Small spills/leaks
Absorb on sand or vermiculite and place in closed containers for disposal. Ventilate area and wash spill site after material pickup is complete.
Stability
Stable at normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents.
Decomposition
Carbon monoxide, Carbon dioxide, Sulfur oxides.

Fire.
Flash Point,°C
109
Fire fighting
Extinguish with water spray, carbon dioxide, dry chemical powder or appropriate foam. Wear self-contained breathing apparatus and protective clothing to prevent contact with skin and eyes.
Hazards
Emits toxic fumes under fire conditions.
Health
2
 
Flammability
0
 
 
Reactivity
0
 

Health.
Exposure effects
   Ingestion
May be harmful if swallowed.
   Inhalation
May be harmful if inhaled. Material may be irritating to mucous membranes and upper respiratory tract.
   Skin
May cause skin irritation. May be harmful if absorbed through the skin. May cause allergic skin reaction.
   Eyes
Causes eye irritation.

First aid
 
   Ingestion
If swallowed, wash out mouth with water provided person is conscious. Call a physician.
   Inhalation
If inhaled, remove to fresh air. If not breathing give artificial respiration. If breathing is difficult, give oxygen.
   Skin
In case of contact, immediately wash skin with soap and copious amounts of water. Remove contaminated clothing and shoes. Call a physician.
   Eyes
In case of contact with eyes, flush with copious amounts of water for at least 15 minutes. Assure adequate flushing by separating the eyelids with fingers. Call a physician.

Transport.
UN number
3334
Response guide
Hazard class
9
Packing Group
III