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Methylacetylene cas no:74-99-7

Synonyms: Propyne 96%; Propyne

Identification
NameMethylacetylene
CAS74-99-7
SynonymsPropyne 96%; Propyne
EINECS(EC#)200-828-4
Molecular FormulaC3H4
Molecular Weight40.06
Chemical Properties
refractive index1.363
Globally Harmonized System of Classification adn Labelling of Chemicals(GHS)
Hazardclass2.1
Safety Data

Hazard F:Flammable;Xi:Irritant;
Risk R11;R37
Safety

This compound is a simple anesthetic and in high concentration is an asphyxiant. Mutation data reported. Dangerous fire hazard when exposed to heat or flame; can react vigorously with oxidizing materials. Explosive in the form of vapor when exposed to heat or flame. Localized heating of liquid-containing cylinders to 95°C may cause an explosion. Product of reaction with silver nitrate ignites at 150°C. A commercial mixture containing 30% propyne in MAPP gas is similar to ethylene in potential hazards and handling requirements. To fight fire, stop flow of gas. When heated to decomposition it emits acrid smoke and irritating fumes. See also ACETYLENE COMPOUNDS and ALKYNES.
Hazard Codes:
Xi: Irritant
F: Flammable
Risk Statements about MEthyl acetylene (74-99-7):
R11 Highly flammable.
R37 Irritating to respiratory system.
Safety Statements about MEthyl acetylene (74-99-7):
S16 Keep away from sources of ignition.
S36 Wear suitable protective clothing.
S38 In case of insufficient ventilation, wear suitable respiratory equipment. 
 


Toxicity
1.    

mmo-esc 10 pph

    MUREAV    Mutation Research. 307 (1994),335.
2.    

mmo-esc 25 pph

    MUREAV    Mutation Research. 307 (1994),335.
3.    

ihl-rat LC:>42,000 ppm/6H

    AMIHAB    AMA Archives of Industrial Health. 15 (1957),20.

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lotuschem
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