Product Identification

Product Name

4-Chlorobenzene-1,2-diol

Synonyms

4-Chloro-1,2-dihydroxybenzene
4-Chlorobenzene-1,2-diol
4-Chlorocatechol
4-Monochlorocatechol

CAS

2138-22-9

Formula

C6H5ClO2

Molecular Weight

144.56

EINECS

218-381-9

RTECS

UX1490000

RTECS Class

Other

Beilstein/Gmelin

1907691

Beilstein Reference

4-06-00-05614

Physical and Chemical Properties

Solubility in water

Insoluble

Melting Point

90 - 91

Boiling Point

267

Vapor Pressure

0.007 (25 C)

pKa/pKb

8.72 (pKa)

Heat Of Vaporization

70.2 kJ/mol

First Aid Measures

Ingestion

Seek medical assistance.

Inhalation

Move victim to fresh air. Apply artificial respiration if victim is not breathing. Do not use mouth-to-mouth method if victim ingested or inhaled the substance; induce artificial respiration with the aid of a pocket mask equipped with a one-way valve or other proper respiratory medical device. Administer oxygen if breathing is difficult.

Skin

Remove and isolate contaminated clothing and shoes. Immediately flush with running water for at least 20 minutes. For minor skin contact, avoid spreading material on unaffected skin.

Eyes

Immediately flush with running water for at least 20 minutes.

Handling and Storage

Storage

Keep tightly closed.

Hazards Identification

Inhalation

TOXIC; inhalation, ingestion, or skin contact with material may cause severe injury or death. Effects of contact or inhalation may be delayed.

Skin

Contact with molten substance may cause severe burns to skin and eyes. See Inhalation.

Eyes

See Inhalation.

Ingestion

See Inhalation.

Hazards

Contact with metals may evolve flammable hydrogen gas.

EC Risk Phrase

34

EC Safety Phrase

26 36/37/39 45

UN (DOT)

1759

Exposure Controls/Personal Protection

Personal Protection

Compatible chemical-resistant gloves. Chemical safety goggles.

Respirators

Wear positive pressure self-contained breathing apparatus (SCBA).

Exposure Effects

Corrosive. Causes burns.

Fire Fighting Measures

Flash Point

115

Fire Fighting

Extinguish using agent most appropriate for surrounding fire.

Fire Potential

Non-combustible, substance itself does not burn but may decompose upon heating to produce corrosive and/or toxic fumes.

Accidental Release Measures

Small spills/leaks

ELIMINATE all ignition sources. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Stop leak if you can do it without risk. Absorb or cover with dry earth, sand or other non-combustible material and transfer to containers. DO NOT GET WATER INSIDE CONTAINERS.

Stability and Reactivity

Stability

Stable at normal temperatures and pressures.

Incompatibilities

Strong oxidizing agents.

Decomposition

Carbon monoxide, Carbon dioxide, Hydrogen chloride gas.

Combustion Products

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

Transport Information

UN Number

1759

Hazard Class

8

Packing Group

II