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| Methyl acetylene-propadiene mixture | CAS 59355-75-8 | ||
| C3H4 | RTECS UK4920000 | ||
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Synonyms & Trade Names MAPP gas, Methyl acetylene-allene mixture, Methyl acetylene-propadiene mixture (stabilized), Propadiene-methyl acetylene, Propyne-allene mixture, Propyne-propadiene mixture |
DOT ID & Guide 1060 116P (stabilized) |
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Exposure Limits |
NIOSH REL: TWA 1000 ppm (1800 mg/m3) ST 1250 ppm (2250 mg/m3) | ||
| OSHA PEL�: TWA 1000 ppm (1800 mg/m3) | |||
| IDLH 3400 ppm [10%LEL] | Conversion 1 ppm = 1.64 mg/m3 | ||
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Physical Description Colorless gas with a strong, characteristic, foul odor. [Note: A fuel that is shipped as a liquefied compressed gas.] |
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MW: 40.1 |
BP: -36 to -4°F |
FRZ: -213°F |
Sol: Insoluble |
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VP: >1 atm |
IP: ? |
RGasD: 1.48 |
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Fl.P: NA (Gas) |
UEL: 10.8% |
LEL: 3.4% |
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| Flammable Gas | |||
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Incompatibilities & Reactivities Strong oxidizers, copper alloys [Note: Forms explosive compounds at high pressure in contact with alloys containing more than 67% copper.] |
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Measurement Methods NIOSH S85 (II-6); OSHA 7 |
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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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Respirator Recommendations
NIOSH/OSHA Up to 3400 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 canister providing protection against the compound of concern/Any appropriate escape-type, self-contained breathing apparatus |
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| Exposure Routes inhalation, skin and/or eye contact (liquid) | |
| Symptoms Irritation respiratory system; excitement, confusion, anesthesia; liquid: frostbite | |
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Target Organs
respiratory system, central nervous system |
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| See also: INTRODUCTION |