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| Diazomethane | CAS 334-88-3 | ||
| CH2N2 | RTECS PA7000000 | ||
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Synonyms & Trade Names Azimethylene, Azomethylene, Diazirine |
DOT ID & Guide |
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Exposure Limits |
NIOSH REL: TWA 0.2 ppm (0.4 mg/m3) | ||
| OSHA PEL: TWA 0.2 ppm (0.4 mg/m3) | |||
| IDLH 2 ppm See: 334883 | 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 |
BP: -9°F |
FRZ: -229°F |
Sol: Reacts |
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VP: >1 atm |
IP: 9.00 eV |
RGasD: 1.45 |
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Fl.P: NA (Gas) |
UEL: ? |
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 |
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Personal Protection & Sanitation Skin: Frostbite Eyes: Frostbite Wash skin: No recommendation Remove: When wet (flammable) Change: No recommendation Provide: Frostbite |
First Aid (See procedures) Eye: Frostbite Skin: Frostbite Breathing: Respiratory support |
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Important additional information about respirator selection 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 |
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| Exposure Routes inhalation, skin and/or eye contact (liquid) | |
| 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 |