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Name	CARBONYL SULFIDE	EINECS	207-340-0
CAS No.	463-58-1	Density	1.259g/cm³
PSA	49.16000	LogP	0.25110
Solubility	N/A	Melting Point	-139 C
Formula	CO S	Boiling Point	46.2°Cat760mmHg
Molecular Weight	60.0764	Flash Point	°C
Transport Information	N/A	Appearance	colourless gas with an unpleasant smell; cylinderwill be marked with red/yellow bands at valve end to denote contentsare both flammable and toxic
Safety	Poison by intraperitoneal route. Mildly toxic by inhalation. Narcotic in high concentration. An irritant. May liberate highly toxic hydrogen sulfide upon decomposition. A very dangerous fire hazard and moderate explosion hazard when exposed to heat or flame. Can react vigorously with oxidizing materials. To fight fire, stop flow of gas or use CO₂, dry chemical, or water spray. When heated to decomposition it emits toxic fumes of CO. See also CARBONYLS and SULFIDES.	Risk Codes	R11; R20; R36/37/38
Molecular Structure		Hazard Symbols	Narcotic in high concentrations. Flammable, explosive limits in air 12–28.5%.
Synonyms	Carbonylsulfide (8CI); Carbon monoxide monosulfide; Carbon oxide sulfide; Carbonoxysulfide; Carbon oxysulfide (COS); Carbonyl sulfide (COS); OCS; Oxycarbonsulfide (COS); Thiocarbonyl oxide	Article Data	357

CARBONYL SULFIDE Synthetic route

: 201230-82-2
carbon monoxide

: 7446-09-5
sulfur dioxide

A: 463-58-1
carbon oxide sulfide

B: 7704-34-9
sulfur

Conditions

Conditions	Yield
With catalyst: La2O3-TiO2 highest activity with 1:1 La:Ti ratio; 500°C, 1 atm, in the presence of N2;	A <1 B 95%
With catalyst: Fe-Al2O3 byproducts: CO2; highest SO2 reduction with 40 % Fe in the catalyst, maximum COS yield at 400°C;
With catalyst: Cu-Al2O3 H2O vapour diminishes catalyst activity;

: 7218-04-4, 26117-28-2, 616-91-1
N-Acetylcysteine

: 2-(((3-acetamido-4-methoxy-2-methyl-4-oxobutan-2-yl)disulfanecarbonyl)(methyl)amino)-N-methylethan-1-aminium trifluoroacetate

A: 80-73-9
1,3-dimethyl-2-imidazolidinone

B: 463-58-1
carbon oxide sulfide

C: 5545-17-5, 97247-12-6, 139602-29-2
N,N'-bis(acetyl)cystine

D: C13H25N3O4S2*H(1+)

E: C13H22N2O6S3

F: C13H22N2O6S4

G: C13H22N2O6S5

H: C16H28N2O6S5

I: C16H28N2O6S6

J: 76480-10-9
C16H28N2O6S3

K: 76480-11-0
C16H28N2O6S4

L: 83151-19-3
1-Acetamido-1-(carbomethoxy)-2-methyl-2-propyl Hydrodisulfide

Conditions

Conditions	Yield
With diethylenetriaminopentaacetic acid In aq. buffer at 37℃; pH=7.4;	A 87% B n/a C n/a D n/a E n/a F n/a G n/a H n/a I n/a J n/a K n/a L n/a

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: 93097-85-9
di-O-isopropyl-S,S-phthaloyl dixanthate (unsymmetrical)

A: 5698-59-9
benzo[c]thiophene-1,3-dione

B: 463-58-1
carbon oxide sulfide

C: 57542-45-7
O,S-diisopropyl xanthate

D: 19357-64-3
Biphthalidyliden

Conditions

Conditions	Yield
at 250℃; for 0.5h; other dixanthate;	A 29% B 82% C 16% D 24%

: graphite

: 7446-09-5
sulfur dioxide

A: 75-15-0
carbon disulfide

B: 23550-45-0
disulfur

C: 463-58-1
carbon oxide sulfide

Conditions

Conditions	Yield
byproducts: CO, CO2; at 1400 K, with excess of carbon;	A 81.16% B 10.82% C 8.02%
byproducts: CO, CO2; at 1000 K, with excess of carbon;	A 37.08% B 3.22% C 59.7%

: C42H70O35*C11H12OS2

A: 463-58-1
carbon oxide sulfide

B: 59117-56-5
E-(3-phenylallyl) methyl sulfide

Conditions

Conditions	Yield
In neat (no solvent) at 120℃; for 6h; Rate constant; Product distribution;	A n/a B 81%

: 103-72-0
phenyl isothiocyanate

: 215675-49-3
1-cyclohexyl-4,5-diphenylimidazole 3-oxide

A: 463-58-1
carbon oxide sulfide

B: 1-cyclohexyl-4,5-diphenyl-2-(phenylamino)imidazole

Conditions

Conditions	Yield
In dichloromethane at 20℃; for 20h; Cycloaddition; elimination;	A n/a B 81%

: 556-61-6
methyl thioisocyanate

: 215675-47-1
1-methyl-4,5-diphenyl-1H-imidazole 3-oxide

A: 463-58-1
carbon oxide sulfide

B: 2-methylamino-1-methyl-4,5-diphenylimidazole

Conditions

Conditions	Yield
In dichloromethane at 20℃; for 20h; Cycloaddition; elimination;	A n/a B 76%

: 77420-85-0
1,4-diphenyl-1-ethylxanthyl-2,3-diazabutadiene

A: 463-58-1
carbon oxide sulfide

B: 1456-21-9
diphenyl-[1,3,4]thiadiazole

Conditions

Conditions	Yield
at 240℃; for 20h; sealed tube;	A n/a B 69%

: 103-72-0
phenyl isothiocyanate

: 55738-12-0
1-benzyl-4,5-dimethyl-1H-imidazole 3-oxide

A: 463-58-1
carbon oxide sulfide

B: 1-benzyl-4,5-dimethyl-2-(phenylamino)imidazole

Conditions

Conditions	Yield
In dichloromethane at 20℃; for 20h; Cycloaddition; elimination;	A n/a B 58%

: 7218-04-4, 26117-28-2, 616-91-1
N-Acetylcysteine

: C15H19NO5S2

A: 463-58-1
carbon oxide sulfide

B: 39239-85-5
methyl 2-acetamido-3-mercapto-3-methylbutanoate

C: C13H22N2O6S3

D: C16H28N2O6S5

E: C16H28N2O6S6

F: C12H13NO5S

G: C14H22N2O7S3

H: 76480-10-9
C16H28N2O6S3

I: 76480-11-0
C16H28N2O6S4

Conditions

Conditions	Yield
With diethylenetriaminopentaacetic acid; ammonium bicarbonate In aq. buffer at 37℃; pH=7.4; Mechanism; Reagent/catalyst; Solvent;	A n/a B n/a C n/a D n/a E n/a F 53% G n/a H n/a I n/a

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CARBONYL SULFIDE Chemical Properties

MF: COS
MW: 60.08
EINECS: 207-340-0
mp: 138 °C(lit.)
bp: 50 °C(lit.)
vapor density: 2.1 (20 °C, vs air)
vapor pressure: 9034 mm Hg ( 21 °C)
form: gas
Carbonyl sulfide is the chemical 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 isoelectronic with it.

CARBONYL SULFIDE Uses

1、Carbonyl sulfide is used as an intermediate in the production of thiocarbamate herbicides.Carbonyl sulfide is a potential fumigant and a replacement for methyl bromide and phosphine.
2、Carbonyl sulfide's primary use as a chemical intermediate and as a byproduct of carbon disulfide production.
3、It is also a significant sulfur-containing impurity in synthesis gas.

CARBONYL SULFIDE Toxicity Data With Reference

1、As of 1994, there was limited information on the acute toxicity of carbonyl sulfide in humans and in animals.High concentrations (>1000 ppm) can cause sudden collapse, convulsions, and death from respiratory paralysis.
2、In tests with rats, 50% animals died when exposed to 1400 ppm of COS for 90 minutes, or at 3000 ppm for 9 minutes.Limited studies with laboratory animal studies also suggest that continued inhalation of low concentrations (approximately 50 ppm for up to 12 weeks) does not affect the lungs or the heart.

CARBONYL SULFIDE Consensus Reports

Community Right-To-Know List. Reported in EPA TSCA Inventory.

CARBONYL SULFIDE Safety Profile

Hazard Codes： F,Xn
Risk Statements： 11-20-36/37/38
Safety Statements： 16-26-38
RIDADR： UN 2204 2.3
WGK Germany： 3
RTECS： FG6400000
HazardClass： 2.3
Poison by intraperitoneal route. Mildly toxic by inhalation. Narcotic in high concentration. An irritant. May liberate highly toxic hydrogen sulfide upon decomposition. A very dangerous fire hazard and moderate explosion hazard when exposed to heat or flame. Can react vigorously with oxidizing materials. To fight fire, stop flow of gas or use CO₂, dry chemical, or water spray. When heated to decomposition it emits toxic fumes of CO.

CARBONYL SULFIDE Standards and Recommendations

DOT Classification: 2.3; Label: Poison Gas, Flammable Gas

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