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carbonyl sulfide

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Origin: China

Cas No: 463-58-1

Specification: 99%min

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CAS No.: 463-58-1 Formula: COS Molecular Weight: 60.07510

Description

Carbonyl sulfide is the organic compound with the formula OCS. Commonly written as COS, it is a colourless flammable gas with an unpleasant odor. It is a linear molecule consisting of a carbonyl group 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.
Carbonyl sulfide decomposes in the presence of humidity and bases to carbon dioxide and hydrogen sulfide.
This compound is found to catalyze the formation of peptides from amino acids. This finding is an extension of the Miller–Urey experiment and it is suggested that carbonyl sulfide played a significant role in the origin of life.

Basic Info

Chemical Name	carbonyl sulfide
Synonyms	sulfanylidenemethanone; Oxycarbon sulfide; carboxyl sulfide; carbon oxide sulfide (COS); Carbon oxide sulfide; Carbonyl sulphide; carbonal sulfide; Carbon oxysulfide; Carbon monoxide monosulfide; thioxomethanone; CARBONYL SULFIDE;
CAS No.	463-58-1
Molecular Formula	COS
Molecular Weight	60.07510
PSA	49.16000
LogP	0.25110

Properties

Appearance & Physical State	colourless gas with an unpleasant smell; cylinderwill be marked with red/yellow bands at valve end to denote contentsare both flammable and toxic
Density	1.259g/cm3
Boiling Point	46.2ºC at 760mmHg
Melting Point	-139ºC
Refractive Index	1.454
Stability	Stable. Corrosive to common metals when moisture is present. Reacts vigorously with oxidants. Flammable. Suck-back into cylinder may cause rupture.
Vapor Density	2.1 (20 °C, vs air)
Vapor Pressure	9090mmHg at 25°C

Safety Info

RTECS	WS6061000
Hazard Class	2.3
Safety Statements	S53; S22; S36/37; S45
HS Code	2930909090
WGK Germany	3
RIDADR	UN 2204 2.3
Risk Statements	R11; R20; R36/37/38
Hazard Codes	T
Symbol	GHS02, GHS06
Signal Word	Danger
Hazard Declaration	H220; H280; H315; H319; H331; H335
Caution Statement	P210; P261; P305 + P351 + P338; P311; P410 + P403

Synthesis Route

p-Methoxy-syn-benzaldoxime+Benzoyl Isothiocyanate→carbonyl sulfide+benzamide
Water+Benzoyl Isothiocyanate→carbonyl sulfide+benzamide
Benzaldoxime, predominantly (E)-isomer+Benzoyl Isothiocyanate→carbonyl sulfide+benzamide

Precursor

potassium N-n-butylmonothiocarbamate
sulfur dioxide
aluminium trichloride
Potassium (methoxycarbonothioyl)sulfide

Downstream Product

Guanidine thiocyanate
orbencarb
DIBUTYL CARBONATE
oxazolidin-2-one

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