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Nitrous oxide																				Related Pages
Synonyms & Trade Names
			Dinitrogen monoxide, Hyponitrous acid anhydride, Laughing gas
CAS No.
			10024-97-2
	RTECS No.
			QX1350000
	DOT ID & Guide
			1070 1222201 122(refrigerated liquid)

FormulaN2O
	Conversion
			1 ppm = 1.80 mg/m3
	IDLH
			N.D.See: IDLH INDEX

Exposure Limits
			NIOSH RELTWA 25 ppm (46 mg/m3) (TWA over the time exposed) [*Note: REL for exposure to waste anesthetic gas.]
					OSHA PEL none
	Measurement Methods
			**NIOSH** 3800 , 6600;**OSHA** ID166
					
					See: NMAM or OSHA Methods
										
Physical Description
			Colorless gas with a slightly sweet odor.
					[inhalation anesthetic] [Note: Shipped as a liquefied compressed gas.]													
										
Molecular Weight44.0	
	Boiling Point-127°F
	Freezing Point-132°F
	Solubility(77°F): 0.1%
	Vapor Pressure51.3 atm
	Ionization Potential12.89 eV											
Flash PointNA
	Upper Explosive LimitNA
	Lower Explosive LimitNA
	Relative Gas Density1.53
Nonflammable Gas, but supports combustion at elevated temperatures.
Incompatibilities & Reactivities
			Aluminum, boron, hydrazine, lithium hydride, phosphine, sodium
Exposure Routes
			inhalation, skin and/or eye contact (liquid)
Symptoms
			dyspnea (breathing difficulty); drowsiness, headache; asphyxia; reproductive effects; liquid: frostbite
Target Organs
			respiratory system, central nervous system, reproductive 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:**Fresh air
Respirator Recommendations
			Not available.
				Important additional information about respirator selection
See also
			INTRODUCTION
					  ICSC CARD: 0067

			
							

			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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CAS Numbers
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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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