| Identification | More | [Name]
2-Butyne | [CAS]
503-17-3 | [Synonyms]
2-BUTYNE
CROTONYLENE
DIMETHYLACETYLENE
But-2-yne
CH3CequivCCH3
Butyne
2-Butyne,98%
2-BUTYNE 98%
Crotonylene, Dimethylacetylene
Crotonylenetylene
CROTONYLENE(DOT) | [EINECS(EC#)]
207-962-2 | [Molecular Formula]
C4H6 | [MDL Number]
MFCD00009275 | [Molecular Weight]
54.09 | [MOL File]
503-17-3.mol |
| Chemical Properties | Back Directory | [Appearance]
clear colorless to light yellow liquid | [Melting point ]
-32 °C | [Boiling point ]
27 °C(lit.)
| [density ]
0.691 g/mL at 25 °C(lit.)
| [vapor pressure ]
11.47 psi ( 20 °C)
| [refractive index ]
n20/D 1.393(lit.)
| [Fp ]
-25 °C
| [storage temp. ]
2-8°C | [form ]
Liquid | [color ]
Clear colorless to light yellow | [Specific Gravity]
0.691 | [Water Solubility ]
Not miscible in water. | [Thermal Conductivity]
0.12 W/(m·K) at 25 ℃ | [BRN ]
1361340 | [InChI]
InChI=1S/C4H6/c1-3-4-2/h1-2H3 | [InChIKey]
XNMQEEKYCVKGBD-UHFFFAOYSA-N | [SMILES]
CC#CC | [CAS DataBase Reference]
503-17-3(CAS DataBase Reference) | [EPA Substance Registry System]
2-Butyne (503-17-3) |
| Safety Data | Back Directory | [Symbol(GHS) ]
 
GHS02,GHS07 | [Signal word ]
Danger | [Hazard statements ]
H224-H315-H319-H335 | [Precautionary statements ]
P210-P302+P352-P305+P351+P338-P403+P233 | [Hazard Codes ]
F+,Xi | [Risk Statements ]
R12:Extremely Flammable.
R36/37/38:Irritating to eyes, respiratory system and skin . | [Safety Statements ]
S16:Keep away from sources of ignition-No smoking .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S36:Wear suitable protective clothing . | [RIDADR ]
UN 1144 3/PG 1
| [WGK Germany ]
3
| [RTECS ]
GQ7210000 | [TSCA ]
Yes | [HazardClass ]
3 | [PackingGroup ]
I | [HS Code ]
29012990 | [Storage Class]
3 - Flammable liquids | [Hazard Classifications]
Eye Irrit. 2
Flam. Liq. 1
Skin Irrit. 2
STOT SE 3 | [Safety Profile]
A simple asphyxiant.
Very dangerous fire hazard when exposed to
heat or flame; can react with oxidzing
materials. Moderately explosive in the form
of vapor when exposed to heat or flame. To
fight fire, use foam, CO2, dry chemicals. See
also ACETYLENE COMPOUNDS and
ARGON (for a description of simple
asphyxiants). |
| Hazard Information | Back Directory | [General Description]
A clear colorless liquid with a petroleum-like odor. Flash point below-4°F. Boiling point 81°F. Less dense than water and insoluble in water. Vapors heavier than air. | [Reactivity Profile]
CROTONYLENE(503-17-3) may react vigorously with strong oxidizing agents. May react exothermically with reducing agents to release hydrogen gas. In the presence of various catalysts (such as acids) or initiators, may undergo exothermic addition polymerization reactions. | [Air & Water Reactions]
Highly flammable. Insoluble in water. | [Hazard]
Flammable, dangerous fire risk. Moderate
explosion hazard. | [Health Hazard]
Inhalation or contact with material may irritate or burn skin and eyes. Fire may produce irritating, corrosive and/or toxic gases. Vapors may cause dizziness or suffocation. Runoff from fire control or dilution water may cause pollution. | [Chemical Properties]
clear colorless to light yellow liquid | [Uses]
2-Butyne is used to synthesize alkylated hydroquinones in the total synthesis of Vitamin E. It is also used as pharmaceutical intermediates. | [Purification Methods]
Stand it over sodium for 24hours, then fractionally distil it under reduced pressure into a cooled receiver. [Beilstein 1 IV 971.] |
|
| Company Name: |
Alfa Aesar
|
| Telephone: |
400-6106006 |
| Website: |
http://chemicals.thermofisher.cn |
| Company Name: |
Energy Chemical
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| Telephone: |
400-0056266 |
| Website: |
www.energy-chemical.com |
| Company Name: |
Sigma-Aldrich
|
| Telephone: |
021-61415566 800-8193336 |
| Website: |
https://www.sigmaaldrich.cn |
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