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Methylamine																				Related Pages
Synonyms & Trade Names
			Aminomethane, Methylamine (anhydrous), Methylamine (aqueous), Monomethylamine
CAS No.
			74-89-5
	RTECS No.
			PF6300000
	DOT ID & Guide
			1061 118(anhydrous)1235 132(aqueous)

FormulaCH3NH2
	Conversion
			1 ppm = 1.27 mg/m3
	IDLH
			100 ppmSee: 74895

Exposure Limits
			NIOSH RELTWA 10 ppm (12 mg/m3)
					OSHA PEL TWA 10 ppm (12 mg/m3)
	Measurement Methods
			**OSHA** 40
					
					See: NMAM or OSHA Methods
										
Physical Description
			Colorless gas with a fish- or ammonia-like odor.
					[Note: A liquid below 21°F. Shipped as a liquefied compressed gas.]													
										
Molecular Weight31.1	
	Boiling Point21°F
	Freezing Point-136°F
	SolubilitySoluble
	Vapor Pressure3.0 atm
	Ionization Potential8.97 eV											
Specific Gravity0.70 (Liquid at 13°F)	
	Flash PointNA (Gas) 14°F (Liquid)
	Upper Explosive Limit20.7%
	Lower Explosive Limit4.9%
	Relative Gas Density1.08
Flammable Gas
Incompatibilities & Reactivities
			Mercury, strong oxidizers, nitromethane
					[Note: Corrosive to copper & zinc alloys, aluminum & galvanized surfaces.]
Exposure Routes
			inhalation, skin absorption (solution), ingestion (solution), skin and/or eye contact (solution/liquid)
Symptoms
			irritation eyes, skin, respiratory system; cough; skin, mucous membrane burns; dermatitis; conjunctivitis; liquid: frostbite
Target Organs
			Eyes, skin, respiratory system
										
Personal Protection/Sanitation
			(See protection codes) **Skin:**Prevent skin contact (solution)/Frostbite
							**Eyes:**Prevent eye contact (solution)/Frostbite
							**Wash skin:**When contaminated (solution)
							**Remove:**When wet (flammable)
							**Change:**No recommendation
							**Provide:**Frostbite wash
	First Aid
			(See procedures)**Eye:**Irrigate immediately (solution)/Frostbite
							**Skin:**Water flush immediately (solution)/Frostbite
							**Breathing:**Respiratory support
							**Swallow:**Medical attention immediately (solution)
Respirator Recommendations
			**NIOSH/OSHA****Up to 100 ppm**: (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 = 25) Any powered, air-purifying respirator with cartridge(s) 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: 1483

			
							

			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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