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Chlorine																				Related Pages
Synonyms & Trade Names
			Molecular chlorine
CAS No.
			7782-50-5
	RTECS No.
			FO2100000
	DOT ID & Guide
			1017 124

FormulaCl2
	Conversion
			1 ppm = 2.90 mg/m3
	IDLH
			10 ppmSee: 7782505

Exposure Limits
			NIOSH RELC 0.5 ppm (1.45 mg/m3) [15-minute]
					OSHA PEL C 1 ppm (3 mg/m3) See Appendix G
	Measurement Methods
			**NIOSH** 6011;**OSHA** ID101 , ID126SGX
					
					See: NMAM or OSHA Methods
										
Physical Description
			Greenish-yellow gas with a pungent, irritating odor.
					[Note: Shipped as a liquefied compressed gas.]													
										
Molecular Weight70.9	
	Boiling Point-29°F
	Freezing Point-150°F
	Solubility0.7%
	Vapor Pressure6.8 atm
	Ionization Potential11.48 eV											
Flash PointNA
	Upper Explosive LimitNA
	Lower Explosive LimitNA
	Relative Gas Density2.47
Nonflammable Gas, but a strong oxidizer.
Incompatibilities & Reactivities
			Reacts explosively or forms explosive compounds with many common substances such as acetylene, ether, turpentine, ammonia, fuel gas, hydrogen & finely divided metals.
Exposure Routes
			inhalation, skin and/or eye contact
Symptoms
			Burning of eyes, nose, mouth; lacrimation (discharge of tears), rhinorrhea (discharge of thin nasal mucus); cough, choking, substernal (occurring beneath the sternum) pain; nausea, vomiting; headache, dizziness; syncope; pulmonary edema; pneumonitis; hypoxemia (reduced O2 in the blood); dermatitis; liquid: frostbite
Target Organs
			Eyes, skin, respiratory system
										
Personal Protection/Sanitation
			(See protection codes) **Skin:**Frostbite
							**Eyes:**Frostbite
							**Wash skin:**No recommendation
							**Remove:**No recommendation
							**Change:**No recommendation
							**Provide:**Frostbite wash
	First Aid
			(See procedures)**Eye:**Frostbite
							**Skin:**Frostbite
							**Breathing:**Respiratory support
Respirator Recommendations
			**NIOSH****Up to 5 ppm**: (APF = 10) Any chemical cartridge respirator with cartridge(s) providing protection against the compound of concern*(APF = 10) Any supplied-air respirator***Up to 10 ppm**: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode*(APF = 25) Any powered, air-purifying respirator with cartridge(s) providing protection against the compound of concern*(APF = 50) Any chemical cartridge respirator with a full facepiece and cartridge(s) providing protection against the compound of concern(APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted canister providing protection against the compound of concern(APF = 50) Any self-contained breathing apparatus with a full facepiece(APF = 50) Any supplied-air respirator with a full facepiece**Emergency or planned entry into unknown concentrations or IDLH conditions:** (APF = 10,000) Any self-contained breathing apparatus that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode(APF = 10,000) Any supplied-air respirator that has a full facepiece and is operated in a pressure-demand or other positive-pressure mode in combination with an auxiliary self-contained positive-pressure breathing apparatus**Escape:** (APF = 50) Any air-purifying, full-facepiece respirator (gas mask) with a chin-style, front- or back-mounted canister providing protection against the compound of concernAny appropriate escape-type, self-contained breathing apparatus
				Important additional information about respirator selection
See also
			INTRODUCTION
					  ICSC CARD: 0126
					  MEDICAL TESTS: 0044

			
							

			Page last reviewed:  October 30, 2019						Content
							source: 	National Institute for Occupational Safety and Health NIOSH Pocket Guide to Chemical Hazards
Introduction
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Appendices
A – NIOSH Potential Occupational Carcinogens
B – Thirteen OSHA-Regulated Carcinogens
C – Supplementary Exposure Limits
D – Substances with No Established RELs
E – OSHA Respirator Requirements for Selected Chemicals
F – Miscellaneous Notes
G – 1989 Air Contaminants Update Project: Exposure Limits NOT in Effect
Type C & CE – Definitions for Type C and Type CE Respirators
Personal Protection and Sanitation Codes
First Aid Procedures Follow NIOSH Facebook
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