503-17-3

Name 2-Butyne
CAS 503-17-3
EINECS(EC#) 207-962-2
Molecular Formula C4H6
MDL Number MFCD00009275
Molecular Weight 54.09
MOL File 503-17-3.mol
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Chemical Properties

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)
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Safety Data

Symbol(GHS)  Flame (GHS02)Exclamation Mark (GHS07)
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

Material Safety Data Sheet(MSDS)

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