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CHLORINE
(cylinder)
ICSC: 0126
Peer-Review Status: 31.03.2009 Validated
 
CAS #: 7782-50-5 RTECS #: FO2100000
UN #: 1017
EC #: 017-001-00-7
EINECS #: 231-959-5
    Formula: Cl2
Molecular mass: 70.9

TYPES OF
HAZARD /
EXPOSURE
ACUTE HAZARDS / SYMPTOMS      PREVENTION      FIRST AID / FIRE FIGHTING
FIRE Not combustible but enhances combustion of other substances. Many reactions may cause fire or explosion.  NO contact with incompatible substances. See Chemical Dangers.  In case of fire in the surroundings, use appropriate extinguishing media. 
EXPLOSION Risk of fire and explosion. See Chemical Dangers.  NO contact with incompatible materials: See Chemical Dangers  In case of fire: keep cylinder cool by spraying with water. NO direct contact with water. 
 
EXPOSURE   AVOID ALL CONTACT!  IN ALL CASES CONSULT A DOCTOR! 
Inhalation Cough. Sore throat. Shortness of breath. Wheezing. Laboured breathing. Symptoms may be delayed. See Notes.  Use breathing protection, closed system or ventilation.  Fresh air, rest. Half-upright position. Refer immediately for medical attention. Artificial respiration may be needed. See Notes. 
Skin ON CONTACT WITH LIQUID: FROSTBITE. Redness. Burning sensation. Pain. Skin burns.  Cold-insulating gloves. Protective clothing.  First rinse with plenty of water for at least 15 minutes, then remove contaminated clothes and rinse again. Refer immediately for medical attention. 
Eyes Watering of the eyes. Redness. Pain. Burns.  Wear face shield or eye protection in combination with breathing protection.  Rinse with plenty of water for several minutes (remove contact lenses if easily possible). Refer immediately for medical attention. 
Ingestion   Do not eat, drink, or smoke during work.   

SPILLAGE DISPOSAL
PACKAGING & LABELLING
Evacuate danger area! Consult an expert! Personal protection: gas-tight chemical protection suit including self-contained breathing apparatus. Ventilation. Shut off cylinder if possible. Isolate the area until the gas has dispersed. NEVER direct water jet on liquid. Remove gas with fine water spray. Do NOT let this chemical enter the environment.  Special insulated cylinder.
Marine pollutant. 
EC Classification
Symbol: T, N; R: 23-36/37/38-50; S: (1/2)-9-45-61 
UN Classification
UN Hazard Class: 2.3; UN Subsidiary Risks: 8 
GHS Classification
Signal: Danger
Contains gas under pressure; may explode if heated
Fatal if inhaled
Causes severe skin burns and eye damage
May cause respiratory irritation
May cause damage to lungs through prolonged or repeated exposure if inhaled
Very toxic to aquatic life 
cylinder;gascancer;health hazcorrskull;toxicenviro;aqua

EMERGENCY RESPONSE SAFE STORAGE
NFPA Code: H4; F0; R0; OX.  Fireproof if in building. Provision to contain effluent from fire extinguishing. Separated from food and feedstuffs. See Chemical Dangers. Cool. Dry. Keep in a well-ventilated room. Store in an area without drain or sewer access. 

IMPORTANT DATA
Physical State; Appearance
GREENISH-YELLOW COMPRESSED LIQUEFIED GAS WITH PUNGENT ODOUR. 

Physical dangers
The gas is heavier than air. 

Chemical dangers
The solution in water is a strong acid. It reacts violently with bases and is corrosive. The substance is a strong oxidant. Reacts violently with combustible substances and reducing agents. The substance reacts with most organic and inorganic compounds, causing fire and explosion hazard. Attacks metals, some forms of plastic, rubber and coatings. 

Occupational exposure limits
TLV: 0.5 ppm as TWA; 1 ppm as STEL; A4 (not classifiable as a human carcinogen); (ACGIH 2009).
EU OEL ( selected): 0.5ppm, 1.5mg/m³ as STEL;. 

Routes of exposure
Serious by all routes of exposure. 

Inhalation risk
On loss of containment, a harmful concentration of this gas in the air will be reached very quickly. 

Effects of short-term exposure
Lachrymation. The substance is corrosive to the eyes, skin and respiratory tract. Rapid evaporation of the liquid may cause frostbite. Inhalation may cause asthma-like reactions. Inhalation may cause pneumonitis. Inhalation may cause lung oedema, but only after initial corrosive effects on eyes and/or airways have become manifest. See Notes. Exposure could cause death. 

Effects of long-term or repeated exposure
The substance may have effects on the respiratory tract and lungs. This may result in chronic inflammation and impaired functions. The substance may have effects on the teeth. This may result in erosion. 


PHYSICAL PROPERTIES ENVIRONMENTAL DATA
Boiling point: -34°C
Melting point: -101°C
Solubility in water, g/100ml at 20°C: 0.7
Vapour pressure, kPa at 20°C: 673
Relative vapour density (air = 1): 2.5  
The substance is very toxic to aquatic organisms. It is strongly advised not to let the chemical enter into the environment. 

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.
Immediate administration of an appropriate inhalation therapy by a doctor or a person authorized by him/her, should be considered.
The odour warning when the exposure limit value is exceeded is insufficient.
Do NOT use in the vicinity of a fire or a hot surface, or during welding.
Do NOT spray water on leaking cylinder (to prevent corrosion of cylinder).
Turn leaking cylinder with the leak up to prevent escape of gas in liquid state. 

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
       Chlorine (FAO Nutrition Meetings Report Series 40abc)
       Chlorine (WHO Food Additives Series 20)
       CHLORINE (JECFA Evaluation)
       Chlorine (PIM 947)