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Ammonia																				Related Pages
Synonyms & Trade Names
			Anhydrous ammonia, Aqua ammonia, Aqueous ammonia
					[Note: Often used in an aqueous solution.]
CAS No.
			7664-41-7
	RTECS No.
			BO0875000
	DOT ID & Guide
			1005 125(anhydrous)2672 154(10-35% solution)2073 125(>35-50% solution)1005 125(>50% solution)

FormulaNH3
	Conversion
			1 ppm = 0.70 mg/m3
	IDLH
			300 ppmSee: 7664417

Exposure Limits
			NIOSH RELTWA 25 ppm (18 mg/m3) ST 35 ppm (27 mg/m3)
					OSHA PEL TWA 50 ppm (35 mg/m3) See Appendix G
	Measurement Methods
			**NIOSH** 3800 , 6015 , 6016;**OSHA** ID188
					
					See: NMAM or OSHA Methods
										
Physical Description
			Colorless gas with a pungent, suffocating odor.
					[Note: Shipped as a liquefied compressed gas. Easily liquefied under pressure.]													
										
Molecular Weight17.0	
	Boiling Point-28°F
	Freezing Point-108°F
	Solubility34%
	Vapor Pressure8.5 atm
	Ionization Potential10.18 eV											
Flash PointNA (Gas)
	Upper Explosive Limit28%
	Lower Explosive Limit15%
	Relative Gas Density0.60
[Note: Although NH3 does not meet the DOT definition of a Flammable Gas (for labeling purposes), it should be treated as one.]
Incompatibilities & Reactivities
			Strong oxidizers, acids, halogens, salts of silver & zinc
					[Note: Corrosive to copper & galvanized surfaces.]
Exposure Routes
			inhalation, ingestion (solution), skin and/or eye contact (solution/liquid)
Symptoms
			irritation eyes, nose, throat; dyspnea (breathing difficulty), wheezing, chest pain; pulmonary edema; pink frothy sputum; skin burns, vesiculation; liquid: frostbite
Target Organs
			Eyes, skin, respiratory system
										
Personal Protection/Sanitation
			(See protection codes) **Skin:**Prevent skin contact
							**Eyes:**Prevent eye contact
							**Wash skin:**When contaminated (solution)
							**Remove:**When wet or contaminated (solution)
							**Change:**No recommendation
							**Provide:**Eyewash (>10%), Quick drench (>10%)
	First Aid
			(See procedures)**Eye:**Irrigate immediately (solution/liquid)
							**Skin:**Water flush immediately (solution/liquid)
							**Breathing:**Respiratory support
							**Swallow:**Medical attention immediately (solution)
Respirator Recommendations
			**NIOSH****Up to 250 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 300 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: 0414
					  MEDICAL TESTS: 0013

			
							

			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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