Diazomethane
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CAS
334-88-3
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CH2N2
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RTECS
PA7000000
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Synonyms & Trade Names
Azimethylene, Azomethylene, Diazirine
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DOT ID & Guide
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Exposure
Limits
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NIOSH REL: TWA 0.2 ppm (0.4 mg/m3)
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OSHA PEL: TWA 0.2 ppm (0.4 mg/m3)
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IDLH
2 ppm
See: 334883
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Conversion
1 ppm = 1.72 mg/m3
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Physical Description
Yellow gas with a musty odor. [Note: Shipped as a liquefied compressed gas.]
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MW: 42.1
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BP: -9°F
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FRZ: -229°F
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Sol: Reacts
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VP: >1 atm
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IP: 9.00 eV
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RGasD: 1.45
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Fl.P: NA (Gas)
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UEL: ?
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LEL: ?
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Flammable Gas [EXPLOSIVE!]
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Incompatibilities & Reactivities
Alkali metals, water, drying agents such as calcium arsenate [Note: May explode violently on heating, exposure to sunlight, or contact with rough edges such as ground glass.]
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Measurement Methods
NIOSH 2515
See: NMAM or OSHA Methods |
Personal Protection & Sanitation (See protection)
Skin: Frostbite
Eyes: Frostbite
Wash skin: No recommendation
Remove: When wet (flammable)
Change: No recommendation
Provide: Frostbite wash
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First Aid (See procedures)
Eye: Frostbite
Skin: Frostbite
Breathing: Respiratory support
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Respirator Recommendations
NIOSH/OSHA
Up to 2 ppm:
(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 organic vapor canister/Any appropriate escape-type, self-contained breathing apparatus
Important additional information about respirator selection
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Exposure Routes
inhalation, skin and/or eye contact (liquid)
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Symptoms
Irritation eyes; cough, shortness breath; headache, lassitude (weakness, exhaustion); flush skin, fever; chest pain, pulmonary edema, pneumonitis; asthma; liquid: frostbite
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Target Organs
Eyes, respiratory system
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See also: INTRODUCTION
See ICSC CARD: 1256 See MEDICAL TESTS: 0068
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