Ethylacetylene

1-Butyne

Names
IUPAC name but-1-yne
Other names But-1-yne Ethylacetylene Ethylethyne
Identifiers
CAS Number	107-00-6 Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:48087 Y
ChemSpider	7558 Y
ECHA InfoCard	100.003.139
UNII	A6B47CPN6W Y
InChI InChI=1S/C4H6/c1-3-4-2/h1H,4H2,2H3 Y Key: KDKYADYSIPSCCQ-UHFFFAOYSA-N Y InChI=1/C4H6/c1-3-4-2/h1H,4H2,2H3 Key: KDKYADYSIPSCCQ-UHFFFAOYAI
SMILES C#CCC
Properties
Chemical formula	C4H6
Molar mass	54.091 g/mol
Density	0.6783 g cm−3
Melting point	−125.7 °C (−194.3 °F; 147.5 K)
Boiling point	8.08 °C (46.54 °F; 281.23 K)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y  (what is YN ?)
Infobox references

1-Butyne, also known as ethylacetylene, but-1-yne, ethylethyne, and UN 2452, is an extremely flammable and reactive alkyne with chemical formula C₄H₆ and CAS number 107-00-6 that is used in the synthesis of organic compounds. It occurs as a colorless gas.