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propyne

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Origin: China

Cas No: 74-99-7

Specification: 99%min

Min order Quantity: 1 /kg

Supply Ability: 80 mt/month

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Product Description

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CAS No.: 74-99-7 Formula: C3H4 Molecular Weight: 40.06390

Description

Propyne (methylacetylene) is an alkyne with the chemical formula CH3C≡CH. It was a component of MAPP gas—along with its isomer propadiene (allene), which was commonly used in gas welding. Unlike acetylene, propyne can be safely condensed.

Basic Info

Chemical Name	propyne
Synonyms	prop-1-yne; propargyl acid; CH3CequivCH; ALLYLENE; Methylacetylene; 1-Propyne; Propyne; Propine;
CAS No.	74-99-7
Molecular Formula	C3H4
Molecular Weight	40.06390
PSA	0.00000
LogP	0.63950

Properties

Density	0.648 g/cm3
Boiling Point	-23.2ºC
Melting Point	-102.7ºC
Flash Point	-51ºC
Refractive Index	1.363
Vapor Pressure	204.6 mm Hg ( −49.5 °C)

Safety Info

RTECS	UK4250000
Hazard Class	2.1
Safety Statements	S16-S36-S38
HS Code	2901299090
WGK Germany	-
RIDADR	UN 1954
Risk Statements	R11; R37
Hazard Codes	F; Xi

Synthesis Route

3-Chloropropyne→hexa-1,3-dien-5-yne+hexa-1,2-dien-5-yne
(Z)-3,4-dimethylpent-2-ene→propene+penta-2,3-diene
citraconic acid→mesaconic acid+acrylic acid

GC Analysis

Column type	Active phase	Temperature (°C)	Retention Index (I)	Temperature Control Method
Capillary	BPX-5	30.	339.	isothermal
Capillary	CP Sil 5 CB	20.	323.6	isothermal
Capillary	PoraPLOT Q	100.	311.	isothermal
Capillary	PoraPLOT Q	160.	316.	isothermal
Packed	Squalane	27.	297.	isothermal