Diacetylene

Diacetylene
Names
	Preferred IUPAC name Buta-1,3-diyne
	Other names 1,3-Butadiyne; Biacetylene; Butadiyne
Identifiers
CAS Number	460-12-8 ;
3D model (JSmol)	Interactive image;
Beilstein Reference	1236317
ChEBI	CHEBI:37820 ;
ChemSpider	9603 ;
ECHA InfoCard	100.006.641
EC Number	207-303-9;
PubChem CID	9997;
UNII	6389J044O5 ;
CompTox Dashboard (EPA)	DTXSID8060036 ;
	InChI InChI=1S/C4H2/c1-3-4-2/h1-2H Key: LLCSWKVOHICRDD-UHFFFAOYSA-N ; InChI=1/C4H2/c1-3-4-2/h1-2H Key: LLCSWKVOHICRDD-UHFFFAOYAU;
	SMILES C#CC#C;
Properties
Chemical formula	C4H2
Molar mass	50.060 g·mol−1
Appearance	Gas
Boiling point	10 °C (50 °F; 283 K)
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Highly flammable; Peroxide forming
	GHS labelling:
Pictograms
Signal word	Danger
Safety data sheet (SDS)	External MSDS
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). verify (what is ?) Infobox references

Diacetylene (also known as butadiyne) is the organic compound with the formula C₄H₂. It is the simplest compound containing two triple bonds. It is first in the series of polyynes, which are of theoretical but not of practical interest.

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