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| Methylamine | CAS 74-89-5 | ||
| CH3NH2 | RTECS PF6300000 | ||
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Synonyms & Trade Names Aminomethane, Methylamine (anhydrous), Methylamine (aqueous), Monomethylamine |
DOT ID & Guide 1061 118 (anhydrous) 1235 132 (aqueous) |
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Exposure Limits |
NIOSH REL: TWA 10 ppm (12 mg/m3) | ||
| OSHA PEL: TWA 10 ppm (12 mg/m3) | |||
| IDLH 100 ppm | 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 |
BP: 21°F |
FRZ: -136°F |
Sol: Soluble |
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VP: 3.0 atm |
IP: 8.97 eV |
RGasD: 1.08 |
Sp.Gr: 0.70 (Liquid at 13°F) |
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Fl.P: NA (Gas) 14°F (Liquid) |
UEL: 20.7% |
LEL: 4.9% |
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| Flammable Gas Class IA Flammable Liquid | |||
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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 |
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Personal Protection & Sanitation 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 |
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 |
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| 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 | |
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Target Organs
Eyes, skin, respiratory system |
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| See also: INTRODUCTION |