Acetylene

CAS: 74-86-2 · C2H2

2D Structure

Loading 3D structure...

CAS Registry Number

74-86-2

SMILES

C#C

InChI Key

HSFWRNGVRCDJHI-UHFFFAOYSA-N

InChI

InChI=1S/C2H2/c1-2/h1-2H

Comprehensive physical and chemical properties

Property	Value	Source
Molecular Mass	26.04 g/mol	CAS Common Chemistry
	26.037999999999997 g/mol	RDKit
	26.038 g/mol	RDKit
Density	0.62 g/cm³	CAS Common Chemistry
	0.6208 g/cm3 @ -82 °C	CAS Common Chemistry
Wikipedia Url	https://en.wikipedia.org/wiki/Acetylene	CAS Common Chemistry
Canonical SMILES	C#C	CAS Common Chemistry
InChI	InChI=1S/C2H2/c1-2/h1-2H	CAS Common Chemistry
InChI Key	InChIKey=HSFWRNGVRCDJHI-UHFFFAOYSA-N	CAS Common Chemistry
Melting Point	-80.8 °C	CAS Common Chemistry
Name	Acetylene	CAS Common Chemistry
Heavy Atom Count	2	RDKit
Hydrogen Bond Acceptors	0	RDKit
Hydrogen Bond Donors	0	RDKit
Rotatable Bonds	0	RDKit
Aromatic Ring Count	0	RDKit
Topological Polar Surface Area	0.0 Å²	RDKit
LogP	0.24939999999999998	RDKit
	0.2494	RDKit
Molar Refractivity	9.89 cm³/mol	RDKit
Ring Count	0	RDKit
Formal Charge	0	RDKit
Fraction Csp3	0.0	RDKit
Exact Mass	26.015650064 g/mol	RDKit
Boiling Point	-84.0 °C @ 760 Torr	CAS Common Chemistry

NMR, IR, and Mass spectral data

Predicting NMR spectra...

10 ppm 9 8 7 6 5 4 3 2 1 0 ppm

Shift (ppm)	Multiplicity	Integration	Assignment

200 ppm 180 160 140 120 100 80 60 40 20 0 ppm

Shift (ppm)	DEPT	Assignment

Note: These NMR spectra are predicted computationally and may differ from experimental data. Predictions are based on chemical environment analysis.

Convert

MW = 26.04 g/mol; density = 0.620 g/mL. Edit any field — others recompute live.

Mass (g) Moles (mmol) Moles (mol) Volume (mL)