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Nitric oxide																				Related Pages
Synonyms & Trade Names
			Mononitrogen monoxide, Nitrogen monoxide
CAS No.
			10102-43-9
	RTECS No.
			QX0525000
	DOT ID & Guide
			1660 124

FormulaNO
	Conversion
			1 ppm = 1.23 mg/m3
	IDLH
			100 ppmSee: 10102439

Exposure Limits
			NIOSH RELTWA 25 ppm (30 mg/m3)
					OSHA PEL TWA 25 ppm (30 mg/m3)
	Measurement Methods
			**NIOSH** 6014;**OSHA** ID190
					
					See: NMAM or OSHA Methods
										
Physical Description
			Colorless gas.
					[Note: Shipped as a nonliquefied compressed gas.]													
										
Molecular Weight30.0	
	Boiling Point-241°F
	Freezing Point-263°F
	Solubility5%
	Vapor Pressure34.2 atm
	Ionization Potential9.27 eV											
Flash PointNA
	Upper Explosive LimitNA
	Lower Explosive LimitNA
	Relative Gas Density1.04
Nonflammable Gas, but will accelerate the burning of combustible materials.
Incompatibilities & Reactivities
			Fluorine, combustible materials, ozone, NH3, chlorinated hydrocarbons, metals, carbon disulfide
					[Note: Reacts with water to form nitric acid. Rapidly converted in air to nitrogen dioxide.]
Exposure Routes
			inhalation
Symptoms
			irritation eyes, wet skin, nose, throat; drowsiness, unconsciousness; methemoglobinemia
Target Organs
			Eyes, skin, respiratory system, blood, central nervous system
										
Personal Protection/Sanitation
			(See protection codes) **Skin:**No recommendation
							**Eyes:**No recommendation
							**Wash skin:**No recommendation
							**Remove:**No recommendation
							**Change:**No recommendation
	First Aid
			(See procedures)**Breathing:**Respiratory support
Respirator Recommendations
			**NIOSH/OSHA****Up to 100 ppm**: (APF = 25) Any supplied-air respirator operated in a continuous-flow mode*(APF = 50) Any chemical cartridge respirator with a full facepiece and cartridge(s) providing protection against the compound of concern¿(APF = 25) Any powered, air-purifying respirator with 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 = 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:** (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¿Any appropriate escape-type, self-contained breathing apparatus
				Important additional information about respirator selection
See also
			INTRODUCTION
					  ICSC CARD: 1311
					  MEDICAL TESTS: 0159

			
							

			Page last reviewed:  October 30, 2019						Content
							source: 	National Institute for Occupational Safety and Health NIOSH Pocket Guide to Chemical Hazards
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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
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