Product Identification

Product Name

3,4-Dichlorophenol

Synonyms

4,5-Dichlorophenol
Phenol, 3,4-dichloro-

CAS

95-77-2

Formula

C6H4Cl2O

Molecular Weight

163

EINECS

202-450-5

RTECS

SK8800000

RTECS Class

Other

Beilstein/Gmelin

1907693

Beilstein Reference

4-06-00-00952

EC Class

irritant

Physical and Chemical Properties

Appearance

Needles (from benzene, petroleum ether) or light brown and yellow crystals.

Solubility in water

Insoluble

Melting Point

66 - 68

Boiling Point

247

Vapor Pressure

0.017 (25 C)

Density

1.6 g/cm3

pKa/pKb

8.55 (pKa)

Partition Coefficient

3.33

Heat Of Vaporization

50.4 kJ/mol

Heat Of Combustion

-2749 kJ/mol

Usage

Chemical intermediate for 2-chloro-1,4-dihydroxyanthraquinone & 2,3,4-trichlorophenol.

Vapor Density

5.6

Odor threshold

100 ug/L in water

First Aid Measures

Ingestion

Get medical aid. 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. Get medical aid.

Skin

Get medical aid. 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

Store in a cool, dry place. Store in a tightly closed container.

Handling

Wash thoroughly after handling. Do not breathe dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Use only in a chemical fume hood.

Hazards Identification

Inhalation

May cause respiratory tract irritation. Exposure produces central nervous system depression. May be harmful if inhaled. May cause liver damage.

Skin

Causes skin irritation. May be harmful if absorbed through the skin.

Eyes

Causes eye irritation.

Ingestion

Harmful if swallowed. May cause irritation of the digestive tract. May cause burning sensations, coughing, wheezing, laryngitis, shortness of breath and headache.

Hazards

When heated, vapors may form explosive mixtures with air: indoors, outdoors, and sewers explosion hazards.

EC Risk Phrase

R 21/22 36/37/38

EC Safety Phrase

S 24 26 36/37/39

UN (DOT)

2020

Exposure Controls/Personal Protection

Personal Protection

Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.

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.

Exposure Effects

Prolonged exposure can cause damage to the eyes, severe irritation or burns.

Fire Fighting Measures

Flash Point

109

Fire Fighting

Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical foam.

Fire Potential

This material is probably combustible.

Accidental Release Measures

Small spills/leaks

Vacuum or sweep up material and place into a suitable disposal container.

Stability and Reactivity

Disposal Code

3

Incompatibilities

Oxidizing agents, acid chlorides, acid anhydrides.

Stability

Stable under normal temperatures and pressures.

Decomposition

Hydrogen chloride, carbon monoxide, carbon dioxide.

Combustion Products

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

Transport Information

UN Number

2020

Hazard Class

6.1

Packing Group

III

HS Code

2908 10 00