Methyl acetylene |
Synonyms & Trade Names Allylene, Propine, Propyne, 1-Propyne |
CAS No. 74-99-7 |
RTECS No. UK4250000 |
DOT ID & Guide |
FormulaC3H4 |
Conversion 1 ppm = 1.64 mg/m3 |
IDLH 1700 ppm [10%LEL]
See: 74997 |
Exposure Limits NIOSH REL: TWA 1000 ppm (1650 mg/m3)
OSHA PEL: TWA 1000 ppm (1650 mg/m3) |
Measurement Methods
NIOSH S84 (II-5)
See: NMAM or OSHA Methods |
Physical Description Colorless gas with a sweet odor. [Note: A fuel that is shipped as a liquefied compressed gas.] |
MW: 40.1 |
BP: -10°F |
FRZ: -153°F |
Sol: Insoluble |
VP: 5.2 atm |
IP: 10.36 eV |
|
Fl.P: NA (Gas) |
UEL: ? |
LEL: 1.7% |
RGasD: 1.41 |
|
| Flammable Gas |
Incompatibilities & Reactivities Strong oxidizers (such as chlorine), copper alloys [Note: Can decompose explosively at 4.5 to 5.6 atmospheres of pressure.] |
Exposure Routes inhalation, skin and/or eye contact (liquid) |
Symptoms irritation respiratory system; tremor, hyperexcitability, anesthesia; liquid: frostbite |
Target Organs respiratory system, central nervous system |
|
Personal Protection/Sanitation (See protection codes)
Skin: Frostbite
Eyes: Frostbite
Wash skin: No recommendation
Remove: When wet (flammable)
Change: No recommendation
Provide: Frostbite wash |
First Aid (See procedures)
Eye: Frostbite
Skin: Frostbite
Breathing: Respiratory support
|
Respirator Recommendations NIOSH/OSHA Up to 1700 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 |
| See also: INTRODUCTION See ICSC CARD: 0560
|
