| Agent Name |
Methyl acetylene |
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| Alternative Name |
Propyne |
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| CAS Number |
74-99-7 |
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| Formula |
C3-H4 |
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| Major Category |
Other Classes |
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| Synonyms |
Allylene; Propine; 1-Propyne; Propyne; [NIOSH] UN1954 |
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| Category |
Other Organic Compounds |
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| Description |
Colorless gas with a sweet odor. [Note: A fuel that is shipped as a liquefied compressed gas]; [NIOSH] |
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| Sources/Uses |
Used as a welding fuel and chemical intermediate; [ACGIH] |
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| Comments |
High concentrations (42,000 ppm) cause anesthesia in experimental animals; [ACGIH] Possible frostbite from contact with liquid; [NIOSH] A respiratory tract irritant; Inhalation of high concentrations can cause CNS depression; [ICSC] |
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| Exposure Assessment |
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| Skin Designation (ACGIH) |
No |
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| TLV (ACGIH) |
1000 ppm |
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| PEL (OSHA) |
1000 ppm |
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| IDLH (NIOSH) |
1700 ppm |
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| Excerpts from Documentation for IDLHs |
Human data: It has been stated that methyl acetylene appears to be a general anesthetic with comparatively low toxicity [ACGIH 1991]. |
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| Lethal Concentration |
LC (rats) > 42,000 ppm/6h |
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| Explanatory Notes |
IDLH = 10% LEL; |
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| Flammability (NFPA) |
4: burns readily |
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| Adverse Effects |
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| Neurotoxin |
CNS Solvent Syndrome |
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| Links to Other NLM Databases |
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| Health Studies |
Human Health Effects from Hazardous Substances Data Bank: 1-PROPYNE
|
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