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3,4-Dichlorophenol(95-77-2)

Supplier Product Identification Physical and Chemical Properties First Aid Measures Handling and Storage Hazards Identification Exposure Controls/Personal Protection Fire Fighting Measures Accidental Release Measures Stability and Reactivity Transport Information

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
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.