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Phosgene																				Related Pages
Synonyms & Trade Names
			Carbon oxychloride, Carbonyl chloride, Carbonyl dichloride, Chloroformyl chloride
CAS No.
			75-44-5
	RTECS No.
			SY5600000
	DOT ID & Guide
			1076 125

FormulaCOCl2
	Conversion
			1 ppm = 4.05 mg/m3
	IDLH
			2 ppmSee: 75445

Exposure Limits
			NIOSH RELTWA 0.1 ppm (0.4 mg/m3) C 0.2 ppm (0.8 mg/m3) [15-minute]
					OSHA PEL TWA 0.1 ppm (0.4 mg/m3)
	Measurement Methods
			**OSHA** 61
					
					See: NMAM or OSHA Methods
										
Physical Description
			Colorless gas with a suffocating odor like musty hay.
					[Note: A fuming liquid below 47°F. Shipped as a liquefied compressed gas.]													
										
Molecular Weight98.9	
	Boiling Point47°F
	Freezing Point-198°F
	SolubilitySlight
	Vapor Pressure1.6 atm
	Ionization Potential11.55 eV											
Specific Gravity1.43 (Liquid at 32°F)	
	Flash PointNA
	Upper Explosive LimitNA
	Lower Explosive LimitNA
	Relative Gas Density3.48
Nonflammable Gas
Incompatibilities & Reactivities
			Moisture, alkalis, ammonia, alcohols, copper
					[Note: Reacts slowly in water to form hydrochloric acid & carbon dioxide.]
Exposure Routes
			inhalation, skin and/or eye contact (liquid)
Symptoms
			irritation eyes; dry burning throat; vomiting; cough, foamy sputum, dyspnea (breathing difficulty), chest pain, cyanosis; liquid: frostbite
Target Organs
			Eyes, skin, respiratory system
										
Personal Protection/Sanitation
			(See protection codes) **Skin:**Prevent skin contact (liquid)
							**Eyes:**Prevent eye contact (liquid)
							**Wash skin:**When contaminated (liquid)
							**Remove:**When wet or contaminated (liquid)
							**Change:**No recommendation
							**Provide:**Quick drench (liquid)
	First Aid
			(See procedures)**Eye:**Irrigate immediately (liquid)
							**Skin:**Water flush immediately (liquid)
							**Breathing:**Respiratory support
Respirator Recommendations
			**NIOSH/OSHA****Up to 1 ppm**: (APF = 10) Any supplied-air respirator***Up to 2 ppm**: (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: 0007
					  MEDICAL TESTS: 0186

			
							

			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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