MSDS Material Safety Data Sheet


File Name: avogadro_chem_iastate_edu---Cl2_gas.asp
    Material Safety Data Sheet
Version 1.7 MSDS Number 300000000026
Revision Date 07/20/2004 Print Date 08/25/2004


Product name : Chlorine

Chemical formula : Cl2

Synonyms : Chlorine

Product Use Description : General Industrial

Company : Air Products and Chemicals,Inc
7201 Hamilton Blvd.
Allentown, PA 18195-1501

Telephone : 800-345-3148

Emergency telephone number : 800-523-9374 USA
01-610-481-7711 International脛


Components CAS Number Concentration
Chlorine 7782-50-5 100 %

Concentration is nominal. For the exact product composition, please refer to Air Products technical


Emergency Overview
Reacts with water to form corrosive acids.
Vigorously accelerates combustion.
May react violently with combustible materials.
Keep oil, grease, and combustibles away.
Do not breathe gas.
Compressed liquefied gas.

Potential Health Effects
Inhalation : May be fatal if inhaled. If inhaled, remove to fresh air.

Eye contact : May cause eye irritation. May cause permanent eye injury. May cause

Skin contact : Causes skin irritation. Causes skin burns. Contact with liquid may cause cold
burns/frost bite.

Exposure Guidelines

Air Products and Chemicals,Inc Chlorine
Material Safety Data Sheet
Version 1.7 MSDS Number 300000000026
Revision Date 07/20/2004 Print Date 08/25/2004

Primary Routes of Entry : Inhalation

Target Organs : None known.

Symptoms : Irritating to eyes and respiratory system. Cough.

Aggravated Medical Condition
Acute or chronic respiratory conditions.

Environmental Effects
Dangerous for the environment.


General advice : The potential for hydrogen chloride formation exists with every exposure,
therefore its toxicity must be considered. Remove victim to uncontaminated
area wearing self contained breathing apparatus. Keep victim warm and rested.
Call a doctor. Apply artificial respiration if breathing stopped.

Eye contact : In the case of contact with eyes, rinse immediately with plenty of water and
seek medical advice. Keep eye wide open while rinsing.

Skin contact : Immediate medical treatment is necessary as untreated wounds from corrosion
of the skin heal slowly and badly. Flush with copious amounts of water until
treatment is available. Remove contaminated clothing. Drench affected area
with water for at least 15 minutes

Ingestion : Ingestion is not considered a potential route of exposure.

Inhalation : Move to fresh air. In case of shortness of breath, give oxygen. If breathing has
stopped or is labored, give assisted respirations. Supplemental oxygen may be
indicated. If the heart has stopped, trained personnel should begin
cardiopulmonary resuscitation immediately. Mouth to mouth resuscitation is not
recommended. If unconscious, place in recovery position and seek medical
advice. Consult a doctor.

Notes to physician
Treatment : Treat bronchospasm and laryngeal edema if present. Observe for delayed
chemical pneumonitis, pulmonary hemorrhage or edema.


Suitable extinguishing media : All known extinguishing media can be used.

Specific hazards : Upon exposure to intense heat or flame, cylinder will vent rapidly and or rupture
violently. Oxidant. Strongly supports combustion. May react violently with
combustible materials. Some materials which are noncombustible in air may
burn in the presence of an oxidizer. Use of water may result in the formation of
very toxic aqueous solutions. Move away from container and cool with water
from a protected position. Keep adjacent cylinders cool by spraying with large
amounts of water until the fire burns itself out. Keep containers and

Air Products and Chemicals,Inc Chlorine
Material Safety Data Sheet
Version 1.7 MSDS Number 300000000026
Revision Date 07/20/2004 Print Date 08/25/2004

surroundings cool with water spray. Do not allow run-off from fire fighting to
enter drains or water courses. Gas is heavier than air and may collect in low
areas or travel along the ground where there may be an ignition source

Special protective equipment : Use self-contained breathing apparatus and chemically protective clothing.
for fire-fighters


Personal precautions : Evacuate personnel to safe areas. Use self-contained breathing apparatus or
positive pressure air line with mask and escape pack in areas where
concentration is unknown or above the exposure limits. Wear self-contained
breathing apparatus when entering area unless atmosphere is proved to be
safe. Use chemically protective clothing. Ventilate the area.

Environmental precautions : Should not be released into the environment. Prevent further leakage or
spillage if safe to do so. Prevent from entering sewers, basements and
workpits, or any place where its accumulation can be dangerous.

Methods for cleaning up : Ventilate the area. Approach suspected leak areas with caution.

Additional advice : Large releases may require considerable downwind evacuation. If possible,
stop flow of product. Increase ventilation to the release area and monitor
concentrations. If leak is from cylinder or cylinder valve, call the Air Products
emergency telephone number. If the leak is in the user鈥檚 system, close the
cylinder valve, safely vent the pressure, and purge with an inert gas before
attempting repairs.


Carbon steel, stainless steel, Monel or copper are suitable materials of construction when no moisture is
present. Hastelloy, platinum or gold offer good resistance to corrosion when moisture is present. Protect
cylinders from physical damage; do not drag, roll, slide or drop. Do not allow storage area temperature to
exceed 50掳C (122掳F). Only experienced and properly instructed persons should handle compressed gases.
Before using the product, determine its identity by reading the label. Know and understand the properties and
hazards of the product before use. When doubt exists as to the correct handling procedure for a particular gas,
contact the supplier. Do not remove or deface labels provided by the supplier for the identification of the cylinder
contents. When moving cylinders, even for short distances, use a cart (trolley, hand truck, etc.) designed to
transport cylinders. Leave valve protection caps in place until the container has been secured against either a
wall or bench or placed in a container stand and is ready for use. Use an adjustable strap wrench to remove
over-tight or rusted caps. Before connecting the container, check the complete gas system for suitability,
particularly for pressure rating and materials. Before connecting the container for use, ensure that back feed
from the system into the container is prevented. Ensure the complete gas system is compatible for pressure
rating and materials of construction. Ensure the complete gas system has been checked for leaks before use.
Employ suitable pressure regulating devices on all containers when the gas is being emitted to systems with
lower pressure rating than that of the container. Never insert an object (e.g. wrench, screwdriver, pry bar, etc.)
into valve cap openings. Doing so may damage valve, causing a leak to occur. Open valve slowly. If user
experiences any difficulty operating cylinder valve discontinue use and contact supplier. Close container valve
after each use and when empty, even if still connected to equipment. Never attempt to repair or modify
container valves or safety relief devices. Damaged valves should be reported immediately to the supplier. Close

Air Products and Chemicals,Inc Chlorine
Material Safety Data Sheet
Version 1.7 MSDS Number 300000000026
Revision Date 07/20/2004 Print Date 08/25/2004

valve after each use and when empty. Replace outlet caps or plugs and container caps as soon as container is
disconnected from equipment. Do not subject containers to abnormal mechanical shocks which may cause
damage to their valve or safety devices. Never attempt to lift a cylinder by its valve protection cap or guard. Do
not use containers as rollers or supports or for any other purpose than to contain the gas as supplied. Never
strike an arc on a compressed gas cylinder or make a cylinder a part of an electrical circuit. Keep container
valve outlets clean and free from contaminates particularly oil and water. Do not smoke while handling product
or cylinders. Never re-compress a gas or a gas mixture without first consulting the supplier. Never attempt to
transfer gases from one cylinder/container to another. Always use backflow protective device in piping. Purge
system with dry inert gas (e.g. helium or nitrogen) before gas is introduced and when system is placed out of
service. Avoid suckback of water, acid and alkalis. Installation of a cross purge assembly between the cylinder
and the regulator is recommended. When returning cylinder install valve outlet cap or plug leak tight. Never
permit oil, grease, or other readily combustible substances to come into contact with valves or containers
containing oxygen or other oxidants. Do not use rapidly opening valves (e.g. ball valves). Open valve slowly to
avoid pressure shock. Never pressurize the entire system at once. Use only with equipment cleaned for oxygen
service and rated for cylinder pressure. Never use direct flame or electrical heating devices to raise the pressure
of a container. Containers should not be subjected to temperatures above 50掳C (122掳F). Prolonged periods of
cold temperature below -30掳C (-20掳F) should be avoided. Never attempt to increase liquid withdrawal rate by
pressurizing the container without first checking with the supplier. Never permit liquefied gas to become trapped
in parts of the system as this may result in hydraulic rupture.

Containers should be stored in the vertical position and properly secured to prevent toppling. The container
valves should be tightly closed and where appropriate valve outlets should be capped or plugged. Container
valve guards or caps should be in place. Full containers should be stored so that oldest stock is used first. Keep
containers tightly closed in a cool, well-ventilated place. Stored containers should be periodically checked for
general condition and leakage. Observe all regulations and local requirements regarding storage of containers.
Local codes may have special requirements for toxic gas storage. Protect containers stored in the open against
rusting and extremes of weather. Containers should not be stored in conditions likely to encourage corrosion.
Containers should be stored in a purpose build compound which should be well ventilated, preferably in the
open air. Keep container tightly closed in a dry and well-ventilated place. Store containers in location free from
fire risk and away from sources of heat and ignition. Full and empty cylinders should be segregated. Do not
allow storage temperature to exceed 50掳C (122掳F). Display "No Smoking or Open Flames" signs in the storage
areas. Return empty containers in a timely manner. Flammable storage areas should be separated from oxygen
and other oxidizers by a minimum distance of 20 ft. (6.1 m.) or by a barrier of non-combustible material at least 5
ft. (1.5 m.) high, having a fire resistance rating of at least 1/2 hour.

Technical measures/Precautions
Containers should be segregated in the storage area according to the various categories (e.g. flammable, toxic,
etc.) and in accordance with local regulations. Keep away from combustible material. Where necessary
containers containing oxygen and oxidants should be separated from flammable gases by a fire resistant
partition. Segregate from flammable gases and other flammable materials in store.


Engineering measures
Provide natural or explosion-proof ventilation adequate to ensure concentrations are kept below exposure limits.

Personal protective equipment
Respiratory protection : Use self-contained breathing apparatus or positive pressure air line with mask
and escape pack in areas where concentration is unknown or above the

Air Products and Chemicals,Inc Chlorine
Material Safety Data Sheet
Version 1.7 MSDS Number 300000000026
Revision Date 07/20/2004 Print Date 08/25/2004

exposure limits. Users of breathing apparatus must be trained.

Hand protection : Acid resistant gloves.
Sturdy work gloves are recommended for handling cylinders.
The breakthrough time of the selected glove(s) must be greater than the
intended use period.

Eye protection : Safety glasses recommended when handling cylinders.
A full faceshield should be worn in addition to safety glasses when connecting,
disconnecting or opening cylinders.

Skin and body protection : Acid resistant gloves (e.g. butyl rubber, neoprene, polyethylene) and splash suit
when connecting, disconnecting or opening cylinders.
Cold temperatures may cause embrittlement of protective material resulting in
breakage and exposure.
Contact with cold evaporating liquid on gloves or suit may cause cryogenic
burns or frostbite.
Safety shoes are recommended when handling cylinders.

Special instructions for : Ensure adequate ventilation, especially in confined areas. Provide good
protection and hygiene ventilation and/or local exhaust to prevent accumulation of concentrations
above exposure limits. Gloves must be clean and free of oil and grease.

Exposure limit(s)

Chlorine Time Weighted Average (TWA): ACGIH 0.5 ppm 脛 -
Chlorine Short Term Exposure Limit (STEL): ACGIH 1 ppm 脛 -
Chlorine Ceiling Limit Value and Time Period (if 0.5 ppm 脛 1.45 mg/m3 脛

specified): NIOSH
Chlorine Ceiling Limit Value: OSHA Z1 1 ppm 脛 3 mg/m3 脛
Chlorine Time Weighted Average (TWA): OSHA Z1A 0.5 ppm 脛 1.5 mg/m3 脛
Chlorine Short Term Exposure Limit (STEL): OSHA Z1A 1 ppm 脛 3 mg/m3 脛


Form : Liquefied gas.

Color : Greenish-yellow.

Odor : Pungent.

Molecular Weight : 70.91 g/mol

Relative vapor density : 2.448 (air = 1)

Relative density : 1.6 (water = 1)

Vapor pressure : 98.62 psia (6.80 bar) at 68 掳F (20 掳C)

Density : 0.187 lb/ft3 (0.0030 g/cm3) at 70 掳F (21 掳C)
Note: (as vapor)

Air Products and Chemicals,Inc Chlorine
Material Safety Data Sheet
Version 1.7 MSDS Number 300000000026
Revision Date 07/20/2004 Print Date 08/25/2004

Specific Volume : 5.39 ft3/lb (0.3365 m3/kg) at 70 掳F (21 掳C)

Boiling point/range : -29 掳F ( 33.8 掳C)

Critical temperature : 291 掳F (144 掳C)

Melting point/range : -150 掳F (-101 掳C)

Water solubility : 8.620 g/l


Stability : Stable under normal conditions.

Materials to avoid : Water.
Strong bases.
May react violently with combustible materials.
May react violently with reducing agents.
Violently oxidises organic material.
Reacts with water to form corrosive acids.
May react violently with alkalis.
With water causes rapid corrosion of some metals.
Avoid oil, grease and all other combustible materials.
Organic materials.
Flammable materials.


Acute Health Hazard
Ingestion : No data is available on the product itself.

Inhalation : LC50 (1 h) : 293 ppm
Species : Rat.

Skin. : No data is available on the product itself.

Chronic Health Hazard
Pregnant rats exposed for one hour to 300 ppm hydrochloric acid had a five-fold higher incidence of fetal death than
control rats. In addition, the surviving rat pups showed disturbances in kidney function. Rats exposed 6 hours/day, 5
days/week for 6 weeks to Chlorine at a concentration of 1, 3, or 9 ppm exhibited respiratory tract effects and gained
less weight than control animals. The severity of these effects was dose-related. In addition, liver and kidney effects
were observed in the rats treated at > 3 ppm.


Air Products and Chemicals,Inc Chlorine
Material Safety Data Sheet
Version 1.7 MSDS Number 300000000026
Revision Date 07/20/2004 Print Date 08/25/2004

Ecotoxicity effects
Aquatic toxicity : May cause pH changes in aqueous ecological systems.Toxic to aquatic
organisms.May cause pH changes in aqueous ecological systems.

Toxicity to other organisms : No data available.

Persistence and degradability
Mobility : No data available.

Bioaccumulation : No data is available on the product itself.

Further information
Toxic to aquatic organisms.


Waste from residues / unused : In accordance with local and national regulations. Return unused product in
products orginal cylinder to supplier. Contact supplier if guidance is required. Must not be
discharged to atmosphere.

Contaminated packaging : Return cylinder to supplier.


Proper shipping name : Chlorine
Class : 2.3 (8)
UN/ID No. : UN1017

Proper shipping name : Chlorine
UN/ID No. : UN1017

Proper shipping name : CHLORINE
Class : 2.3 (8)
UN/ID No. : UN1017

Proper shipping name : CHLORINE
Class : 2.3 (8)
UN/ID No. : UN1017

Further Information
Avoid transport on vehicles where the load space is not separated from the driver鈥檚 compartment. Ensure vehicle
driver is aware of the potential hazards of the load and knows what to do in the event of an accident or an

Air Products and Chemicals,Inc Chlorine
Material Safety Data Sheet
Version 1.7 MSDS Number 300000000026
Revision Date 07/20/2004 Print Date 08/25/2004


OSHA Hazard Communication Standard (29 CFR 1910.1200) Hazard Class(es)
Toxic Oxidizer. Corrosive. Compressed Gas.

Country Regulatory list Notification
USA TSCA Included on Inventory.
EU EINECS Included on Inventory.
Canada DSL Included on Inventory.
Australia AICS Included on Inventory.
Japan ENCS Included on Inventory.
South Korea ECL Included on Inventory.
China SEPA Included on Inventory.
Philippines PICCS Included on Inventory.

EPA SARA Title III Section 312 (40 CFR 370) Hazard Classification:
Acute Health Hazard

Fire Hazard. Sudden Release of Pressure Hazard.

EPA SARA Title III Section 313 (40 CFR 372) Component(s) above 鈥檇e minimus鈥? level:

US. California Safe Drinking Water & Toxic Enforcement Act (Proposition 65)
This product does not contain any chemicals known to State of California to cause cancer, birth defects or any other


NFPA Rating
Health : 4
Fire : 0
Instability : 0
Special : OX

HMIS Rating
Health :3
Flammability :0
Physical hazard :2

Prepared by : Air Products and Chemicals, Inc. Global EH&S Product Safety Department

For additional information, please visit our Product Stewardship web site at

Air Products and Chemicals,Inc Chlorine

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