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NIOSH

CHLORINE

ICSC: 0126

Cl2
Molecular mass: 70.9
(cylinder)
ICSC # 0126 		CAS # 7782-50-5
RTECS # FO2100000
UN # 1017
EC # 017-001-00-7
November 13, 2008 Validated

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 materials; 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 but 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).
Breathing protection. Closed system and ventilation.
Fresh air, rest. Half-upright position. Artificial respiration may be needed. Refer immediately for medical attention.
•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 Causes watering of the eyes. Redness. Pain. Burns .
Safety goggles , face shield and eye protection in combination with breathing protection.
Rinse with plenty of water (remove contact lenses if easily possible). Refer immediately for medical attention.
•INGESTION
Do not eat, drink, or smoke during work.

SPILLAGE DISPOSAL

STORAGE

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.
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.
Special insulated cylinder.
Marine pollutant.
T symbol
N symbol
R: 23-36/37/38-50
S: 1/2-9-45-61
UN Hazard Class: 2.3
UN Subsidiary Risks: 8
Signal: Danger
Cylinder-Corr-Skull-Enviro
Contains gas under pressure; may explode if heated
Fatal if inhaled gas
Causes severe skin burns and eye damage
May cause respiratory irritation
Very toxic to aquatic life
ICSC: 0126 Prepared in the context of cooperation between the International Programme on Chemical Safety & the Commission of the European Communities (C) IPCS CEC 1994. No modifications to the International version have been made except to add the OSHA PELs, NIOSH RELs and NIOSH IDLH values.

CHLORINE

ICSC: 0126

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PHYSICAL STATE; APPEARANCE:
GREEN TO 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 and reacts violently with combustible and reducing materials. The substance reacts with most organic and inorganic compounds , causing fire and explosion hazard. Attacks metal, some forms of

OCCUPATIONAL EXPOSURE LIMITS:
TLV: 0.5 ppm as TWA, 1 ppm as STEL; A4 (not classifiable as a human carcinogen); (ACGIH 2008).
EU OEL: 0.5 ppm, 1.5 mg/m3 as STEL (EU 2006).
OSHA PEL†: C 1 ppm (3 mg/m3)
NIOSH REL: C 0.5 ppm (1.45 mg/m3) 15-minute
NIOSH IDLH: 10 ppm See: 7782505


ROUTES OF EXPOSURE:
Serious local effects 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, the skin and the 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. The effects may be delayed. Medical observation is indicated. Exposure may result in death.

EFFECTS OF LONG-TERM OR REPEATED EXPOSURE:
The substance may have effects on the respiratory tract and lungs , resulting in chronic inflammation and impaired functions . The substance may have effects on the teeth , resulting in dental erosion.

PHYSICAL
PROPERTIES

Boiling point: -34°C
Melting point: -101°C
Solubility in water, g/100 ml at 20°C: 0.7
Vapour pressure, kPa at 20°C: 673
Relative vapour density (air = 1): 2.5

ENVIRONMENTAL
DATA

The substance is very toxic to aquatic organisms. It is strongly advised that this substance does not enter the environment.

N O T E S

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.
Transport Emergency Card: TEC (R)-20S1017 or 20G2TC

NFPA Code: H 4; F 0; R 0; OX

ADDITIONAL INFORMATION



ICSC: 0126 CHLORINE
(C) IPCS, CEC, 1994
IMPORTANT LEGAL NOTICE: Neither NIOSH, the CEC or the IPCS nor any person acting on behalf of NIOSH, the CEC or the IPCS is responsible for the use which might be made of this information. This card contains the collective views of the IPCS Peer Review Committee and may not reflect in all cases all the detailed requirements included in national legislation on the subject. The user should verify compliance of the cards with the relevant legislation in the country of use. The only modifications made to produce the U.S. version is inclusion of the OSHA PELs, NIOSH RELs and NIOSH IDLH values.
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