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CHLORINEICSC: 0126
March 2009
CAS #: 7782-50-5
UN #: 1017
EINECS #: 231-959-5

  ACUTE HAZARDS PREVENTION FIRE FIGHTING
FIRE & EXPLOSION Not combustible but enhances combustion of other substances. Many reactions may cause fire or explosion.  Risk of fire and explosion. See Chemical Dangers.  NO contact with incompatible substances. See Chemical Dangers.  NO contact with incompatible materials: See Chemical Dangers  In case of fire in the surroundings, use appropriate extinguishing media.  In case of fire: keep cylinder cool by spraying with water. NO direct contact with water. 

 AVOID ALL CONTACT! IN ALL CASES CONSULT A DOCTOR! 
  SYMPTOMS ACUTE HAZARDS FIRST AID
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 CLASSIFICATION & 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. 

According to UN GHS Criteria

cylinder;gascancer;health hazcorrskull;toxicenviro;aqua
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 

Transportation
UN Classification
UN Hazard Class: 2.3; UN Subsidiary Risks: 8 

STORAGE
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. 
PACKAGING
Special insulated cylinder.
Marine pollutant. 
CHLORINE ICSC: 0126
PHYSICAL & CHEMICAL INFORMATION

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. 

Formula: Cl2
Molecular mass: 70.9
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  


EXPOSURE & HEALTH EFFECTS

Routes of exposure
Serious by all routes of exposure. 

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. 

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

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. 


Occupational exposure limits
TLV: 0.5 ppm as TWA; 1 ppm as STEL; A4 (not classifiable as a human carcinogen); 1.5 mg/m3, 0.5 ppm, as TWA.
MAK: peak limitation category: I(1); pregnancy risk group: C.
EU-OEL: 1.5 mg/m3, 0.5 ppm as STEL 

ENVIRONMENT
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 by an authorized person, 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 a leaking cylinder (to prevent corrosion of the cylinder).
Turn leaking cylinder with the leak up to prevent escape of gas in liquid state. 

ADDITIONAL INFORMATION
  EC Classification
Symbol: T, N; R: 23-36/37/38-50; S: (1/2)-9-45-61 

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    See Also:
       Toxicological Abbreviations
       Chlorine (FAO Nutrition Meetings Report Series 40abc)
       Chlorine (WHO Food Additives Series 20)
       CHLORINE (JECFA Evaluation)
       Chlorine (PIM 947)