Carbonyl sulfide

Carbonyl sulfide
Names
	IUPAC names Carbonyl sulfide ; Oxidosulfidocarbon
	Systematic IUPAC name Thioxomethanone
Identifiers
CAS Number	463-58-1 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:16573 ;
ChemSpider	9644 ;
ECHA InfoCard	100.006.674
EC Number	207-340-0;
KEGG	C07331 ;
PubChem CID	10039;
UNII	871UI0ET21 ;
UN number	2204
CompTox Dashboard (EPA)	DTXSID6023949 ;
	InChI InChI=1S/COS/c2-1-3 Key: JJWKPURADFRFRB-UHFFFAOYSA-N ; InChI=1/COS/c2-1-3 Key: JJWKPURADFRFRB-UHFFFAOYAF;
	SMILES O=C=S;
Properties
Chemical formula	COS
Molar mass	60.075 g/mol
Appearance	colorless gas
Odor	sulfide-like
Density	2.51 g/L
Melting point	−138.8 °C (−217.8 °F; 134.3 K)
Boiling point	−50.2 °C (−58.4 °F; 223.0 K)
Critical point (T, P)	101.85 °C (215.3 °F; 375.0 K), 58.03 standard atmospheres (5,879.9 kPa; 852.8 psi)
Solubility in water	0.376 g/100 mL (0 °C) ; 0.125 g/100 mL (25 °C)
Solubility	very soluble in KOH, CS2 ; soluble in alcohol, toluene
Magnetic susceptibility (χ)	−32.4×10−6 cm3/mol
Dipole moment	0.65 D
Thermochemistry
Heat capacity (C)	41.5 J/(mol⋅K)
Std molar; entropy (S⦵298)	231.5 J/(mol⋅K)
Std enthalpy of; formation (ΔfH⦵298)	−141.8 kJ/mol
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H220, H315, H319, H331, H335
Precautionary statements	P210, P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P311, P312, P321, P332+P313, P337+P313, P362, P377, P381, P403, P403+P233, P405, P410+P403, P501
NFPA 704 (fire diamond)	3 4 1
Explosive limits	12–29%
Safety data sheet (SDS)	Carbonyl sulfide MSDS
Related compounds
Related compounds	Carbon dioxide; Carbon disulfide; Carbonyl selenide
	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

Carbonyl sulfide is the chemical compound with the linear formula O=C=S. It is a colorless flammable gas with an unpleasant odor. It is a linear molecule consisting of a carbonyl double bonded to a sulfur atom. Carbonyl sulfide can be considered to be intermediate between carbon dioxide and carbon disulfide, both of which are valence isoelectronic with it.

^ ^a ^b International Union of Pure and Applied Chemistry (2005). Nomenclature of Inorganic Chemistry (IUPAC Recommendations 2005). Cambridge (UK): RSC–IUPAC. ISBN 0-85404-438-8. p. 292. Electronic version.
^ Lide, David R.; Kehiaian, Henry V. (1994). CRC Handbook of Thermophysical and Themochemical Data (PDF). CRC Press. p. 32.

[redbook-1] International Union of Pure and Applied Chemistry (2005). Nomenclature of Inorganic Chemistry (IUPAC Recommendations 2005). Cambridge (UK): RSC–IUPAC. ISBN 0-85404-438-8. p. 292. Electronic version.

[2] Lide, David R.; Kehiaian, Henry V. (1994). CRC Handbook of Thermophysical and Themochemical Data (PDF). CRC Press. p. 32.

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