Product Identification

Product Name

3-Hydroxythiophenol

Synonyms

3-Hydroxybenzenethiol
3-Hydroxyphenylmercaptan
3-Hydroxythiophenol
m-Hydroxybenzenethiol
m-Mercaptophenol
Monothioresorcinol

CAS

40248-84-8

Formula

C6H6OS

Molecular Weight

126.18

Beilstein Reference

2-06-00-00827

Physical and Chemical Properties

Solubility in water

2.4 g/L

Melting Point

16.5

Boiling Point

242 - 243

Vapor Pressure

0.01 (25 C)

Density

1.237 g/cm3 (25 C)

pKa/pKb

6.50 (pKa)

Partition Coefficient

1.81

Heat Of Vaporization

51.37 kJ/mol

Refractive Index

>1.629 (20 C)

First Aid Measures

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.

Hazards Identification

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.

Hazards

Emits toxic fumes under fire conditions.

EC Risk Phrase

36

EC Safety Phrase

26

UN (DOT)

3334

Exposure Controls/Personal Protection

Personal 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.

Fire Fighting Measures

Flash Point

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.

Accidental Release Measures

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 and Reactivity

Stability

Stable at normal temperatures and pressures.

Incompatibilities

Strong oxidizing agents.

Decomposition

Carbon monoxide, Carbon dioxide, Sulfur oxides.

Transport Information

UN Number

3334

Hazard Class

9

Packing Group

III