Home Categories Propyne (ca. 4% in N,N-Dimethylformamide, ca. 1.0mol/L)
T9814130

Propyne (ca. 4% in N,N-Dimethylformamide, ca. 1.0mol/L) , 74-99-7

CAS NO.:74-99-7

Empirical Formula: C3H4

Molecular Weight: 40.06

MDL number: MFCD00036235

EINECS: 200-828-4

Pack Size Price Stock Quantity
100mL RMB440.00 In Stock
500mL RMB1300.00 In Stock
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Update time: 2022-07-08

PRODUCT Properties

Melting point: -102.7 °C (lit.)
Boiling point: -23.2 °C (lit.)
Density  0.6070
vapor pressure  204.6 mm Hg ( −49.5 °C)
refractive index  1.3863
Flash point: -51 °C
solubility  Soluble in alcohol, benzene, and chloroform (Weast, 1986)
form  gas
color  Colorless, flammable gas with a sweet odor
Water Solubility  3,640 mg/L at 20 °C (quoted, Verschueren, 1983)
Henry's Law Constant 0.11 at 25 °C (Hine and Mookerjee, 1975)
Exposure limits NIOSH REL: TWA 1,000 ppm (1,650 mg/m3), IDLH 1,700 ppm; OSHA PEL: TWA 1,000 ppm; ACGIH TLV: TWA 1,000 ppm (adopted).
InChIKey MWWATHDPGQKSAR-UHFFFAOYSA-N

Description and Uses

Methyl acetylene is a flammable, colorless gas with a sweet odor. Molecular weight= 40.07;Boiling point=23.3℃; Freezing/Melting point=102.8℃; Vapor pressure= 5.2 atm; Relative vapor density (air= 1)= 1.41. Explosive limits: LEL= 1.7%; UEL= 11.7%. Hazard Identification (based on NFPA-704 M Rating System): Health 2, Flammability 4, Reactivity 2. A fuel that is shipped as a liquefied compressed gas. Practically insoluble in water; solubility 0.4%.

Propyne is produced by thermal or catalytic pyrolysis of propene. Like acetylene, propyne is used as a welding torch fuel, as a specialty fuel, and chemical intermediate.

Safety

Symbol(GHS) 
GHS02,GHS04,GHS07
Signal word  Danger
Hazard statements  H220-H280-H335
Precautionary statements  P210-P410+P403
Hazard Codes  F,Xi
Risk Statements  11-37-43
Safety Statements  16-36-38-37
RIDADR  UN 1954 2.1
OEB A
OEL TWA: 1000 ppm (1650 mg/m3)
WGK Germany  -
RTECS  UK4250000
HazardClass  2.1
PackingGroup  II
HS Code  2901290000
IDLA 1,700 ppm [10% LEL]

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