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2,4-DICHLOROPHENOL
ICSC: 0438
Peer-Review Status: 06.05.2010 Validated
2,4-DCP
2,4-Dichlorohydroxybenzene
1-Hydroxy-2,4-dichlorobenzene 
CAS #: 120-83-2 RTECS #: SK8575000
UN #: 2020
EC #: 604-011-00-7
EINECS #: 204-429-6
    Formula: C6H4Cl2O
Molecular mass: 163.0

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Combustible. Gives off irritating or toxic fumes (or gases) in a fire.  NO open flames.  Use water spray, foam, powder, carbon dioxide. 
EXPLOSION Finely dispersed particles form explosive mixtures in air.  Prevent build-up of electrostatic charges (e.g., by grounding).   
 
EXPOSURE   PREVENT DISPERSION OF DUST! PREVENT GENERATION OF MISTS! AVOID ALL CONTACT!  IN ALL CASES CONSULT A DOCTOR! 
Inhalation Sore throat. Cough. Burning sensation behind the breastbone. Shortness of breath. Laboured breathing. Further see Ingestion.  Use local exhaust or breathing protection.  Fresh air, rest. Half-upright position. Refer immediately for medical attention. 
Skin MAY BE ABSORBED! Redness. Pain. Blisters. Further see Inhalation.  Protective gloves. Protective clothing.  Wear protective gloves when administering first aid. Remove contaminated clothes. See Notes. To remove substance use polyethylene glycol 400 or vegetable oil. Rinse skin with plenty of water or shower. Refer immediately for medical attention. 
Eyes Redness. Pain. Severe burns.  Wear face shield or eye protection in combination with breathing protection.  Rinse with plenty of water (remove contact lenses if easily possible). Refer immediately for medical attention. 
Ingestion Burns in mouth and throat. Abdominal pain. Tremor. Convulsions. Shock or collapse.  Do not eat, drink, or smoke during work.  Rinse mouth. Do NOT induce vomiting. Refer immediately for medical attention. 

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Personal protection: chemical protection suit including self-contained breathing apparatus. Do NOT let this chemical enter the environment. Sweep spilled substance into covered containers. If appropriate, moisten first to prevent dusting. Carefully collect remainder. Then store and dispose of according to local regulations.  Do not transport with food and feedstuffs. 
EC Classification
Symbol: T, N; R: 22-24-34-51/53; S: (1/2)-26-36/37/39-45-61 
UN Classification
UN Hazard Class: 6.1; UN Pack Group: III 
GHS Classification
Signal: Danger
Harmful if swallowed
Toxic in contact with skin
Causes severe skin burns and eye damage
Causes damage to central nervous system
May cause damage to the respiratory system if inhaled
Toxic to aquatic life with long lasting effects 
corrskull;toxiccancer;health hazenviro;aqua

EMERGENCY RESPONSE SAFE STORAGE
NFPA Code: H3; F1; R0.  Fireproof. Store in an area without drain or sewer access. Provision to contain effluent from fire extinguishing. Separated from strong oxidants and food and feedstuffs. Ventilation along the floor. 

IMPORTANT DATA
Physical State; Appearance
COLOURLESS CRYSTALS WITH CHARACTERISTIC ODOUR. 

Physical dangers
Dust explosion possible if in powder or granular form, mixed with air. If dry, it can be charged electrostatically by swirling, pneumatic transport, pouring, etc. 

Chemical dangers
Decomposes on heating. This produces toxic fumes including chlorine and hydrogen chloride. Decomposes on burning. This produces toxic fumes including phosgene and dioxins. Reacts violently with acids and strong oxidants. 

Occupational exposure limits
TLV (NOT-ESTABLISHED):.
MAK (not established):. 

Routes of exposure
The substance can be absorbed into the body by inhalation, through the skin and by ingestion. Serious local effects by all routes of exposure. 

Inhalation risk
A harmful contamination of the air will not or will only very slowly be reached on evaporation of this substance at 20°C; when in molten form, however, evaporation will be much faster. 

Effects of short-term exposure
The substance is corrosive to the eyes, skin and respiratory tract. Corrosive on ingestion. The hot liquid may cause severe skin burns. Exposure to the molten substance may result in extensive skin absorption and rapid death. Inhalation of the vapour may cause lung oedema. See Notes. Medical observation is indicated. The substance may cause effects on the central nervous system. 

Effects of long-term or repeated exposure
 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: 210.0°C
Melting point: 45.0°C
Density: 1.4 g/cm³
Solubility in water, g/100ml at 20°C: 0.45 (poor)
Vapour pressure, Pa at 20°C: 10
Relative vapour density (air = 1): 5.6
Relative density of the vapour/air-mixture at 20°C (air = 1): 1.00
Flash point: 113°C o.c.
Auto-ignition temperature: 500°C
Octanol/water partition coefficient as log Pow: 3.17  
The substance is toxic to aquatic organisms. This substance does enter the environment under normal use. Great care, however, should be taken to avoid any additional release, for example through inappropriate disposal. 

NOTES
The symptoms of lung oedema often do not become manifest until a few hours have passed and they are aggravated by physical effort. Rest and medical observation are therefore essential.
Isolate contaminated clothing by sealing in a bag or other container. 

ADDITIONAL INFORMATION
 

IPCS
International
Programme on
Chemical Safety
WHO ILO EC Prepared in the context of cooperation between the International Programme on Chemical Safety and the European Commission
© IPCS 2004-2012
LEGAL NOTICE Neither the EC nor the IPCS nor any person acting on behalf of the EC or the IPCS is responsible for the use which might be made of this information.


    See Also:
       Toxicological Abbreviations