Diacetylene

Diacetylene

Names
Preferred IUPAC name Buta-1,3-diyne
Other names 1,3-Butadiyne Biacetylene Butadiyne
Identifiers
CAS Number	460-12-8 Y
3D model (JSmol)	Interactive image
Beilstein Reference	1236317
ChEBI	CHEBI:37820 Y
ChemSpider	9603 Y
ECHA InfoCard	100.006.641
EC Number	207-303-9
PubChem CID	9997
UNII	6389J044O5 Y
CompTox Dashboard (EPA)	DTXSID8060036
InChI InChI=1S/C4H2/c1-3-4-2/h1-2H Y Key: LLCSWKVOHICRDD-UHFFFAOYSA-N Y 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). Y verify (what is YN ?) 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.