Methylamine
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CAS
74-89-5
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CH3NH2
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RTECS
PF6300000
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Synonyms & Trade Names
Aminomethane, Methylamine (anhydrous), Methylamine (aqueous), Monomethylamine
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DOT ID & Guide
1061 / 118 (anhydrous)
1235 / 132 (aqueous)
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Exposure
Limits
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NIOSH REL: TWA 10 ppm (12 mg/m3)
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OSHA PEL: TWA 10 ppm (12 mg/m3)
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IDLH
100 ppm
See: 74895
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Conversion
1 ppm = 1.27 mg/m3
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Physical Description
Colorless gas with a fish- or ammonia-like odor. [Note: A liquid below 21°F. Shipped as a liquefied compressed gas.]
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MW: 31.1
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BP: 21°F
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FRZ: -136°F
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Sol: Soluble
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VP: 3.0 atm
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IP: 8.97 eV
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RGasD: 1.08
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Sp.Gr: 0.70 (Liquid at 13°F)
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Fl.P: NA (Gas) 14°F (Liquid)
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UEL: 20.7%
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LEL: 4.9%
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Flammable Gas
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Incompatibilities & Reactivities
Mercury, strong oxidizers, nitromethane [Note: Corrosive to copper & zinc alloys, aluminum & galvanized surfaces.]
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Measurement Methods
OSHA 40
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
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
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First Aid (See procedures)
Eye: Irrigate immediately (solution)/Frostbite
Skin: Water flush immediately (solution)/Frostbite
Breathing: Respiratory support
Swallow: Medical attention immediately (solution)
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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 concern/Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection
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Exposure Routes
inhalation, skin absorption (solution), ingestion (solution), skin and/or eye contact (solution/liquid)
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Symptoms
Irritation eyes, skin, respiratory system; cough; skin, mucous membrane burns; dermatitis; conjunctivitis; liquid: frostbite
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Target Organs
Eyes, skin, respiratory system
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See also: INTRODUCTION
See ICSC CARD: 0178 |
