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Carbon dioxide																				Related Pages
Synonyms & Trade Names
			Carbonic acid gas, Dry ice
					[Note: Normal constituent of air (about 300 ppm)].
CAS No.
			124-38-9
	RTECS No.
			FF6400000
	DOT ID & Guide
			1013 1201845 120(dry ice)2187 120(liquid)

FormulaCO2
	Conversion
			1 ppm = 1.80 mg/m3
	IDLH
			40,000 ppmSee: 124389

Exposure Limits
			NIOSH RELTWA 5000 ppm (9000 mg/m3) ST 30,000 ppm (54,000 mg/m3)
					OSHA PEL TWA 5000 ppm (9000 mg/m3) See Appendix G
	Measurement Methods
			**NIOSH** 6603;**OSHA** ID172
					
					See: NMAM or OSHA Methods
										
Physical Description
			Colorless, odorless gas.
					[Note: Shipped as a liquefied compressed gas. Solid form is utilized as dry ice.]													
										
Molecular Weight44.0	
	Boiling PointSublimes
	Melting Point-109°F (Sublimes)
	Solubility(77°F): 0.2%
	Vapor Pressure56.5 atm
	Ionization Potential13.77 eV											
Flash PointNA
	Upper Explosive LimitNA
	Lower Explosive LimitNA
	Relative Gas Density1.53
Nonflammable Gas
Incompatibilities & Reactivities
			Dusts of various metals, such as magnesium, zirconium, titanium, aluminum, chromium & manganese are ignitable and explosive when suspended in carbon dioxide. Forms carbonic acid in water.
Exposure Routes
			inhalation, skin and/or eye contact (liquid/solid)
Symptoms
			headache, dizziness, restlessness, paresthesia; dyspnea (breathing difficulty); sweating, malaise (vague feeling of discomfort); increased heart rate, cardiac output, blood pressure; coma; asphyxia; convulsions; frostbite (liquid, dry ice)
Target Organs
			respiratory system, cardiovascular 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/OSHA****Up to 40000 ppm**: (APF = 10) Any supplied-air respirator(APF = 50) Any self-contained breathing apparatus 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:** Any appropriate escape-type, self-contained breathing apparatus
				Important additional information about respirator selection
See also
			INTRODUCTION
					  ICSC CARD: 0021

			
							

			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
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