Ethylene sulfide

Description

Ethylene sulfide · CAS 420-12-2 · C2H4S. UNII A2W5165740. Boiling Point: decomposes at 57 °C; Melting Point: -109 °C; Density: 1.0130 g/cu cm at 20 °C.

Identification

CAS Registry Number	420-12-2
PubChem CID	9865
Molecular formula	C2H4S
IUPAC name	thiirane
UNII (FDA)	A2W5165740

Computed Descriptors

Molecular Weight	60.12
XLogP3	0.6
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	1
Rotatable Bond Count	0
Exact Mass	60.00337130
Monoisotopic Mass	60.00337130
Topological Polar Surface Area	25.3
Heavy Atom Count	3
Formal Charge	0

Physical & Chemical Properties

Boiling Point	decomposes at 57 °C
Melting Point	-109 °C
Density	1.0130 g/cu cm at 20 °C
Vapor Pressure	250.0 [mmHg]
Vapor Pressure	250 mm Hg at 25 °C

Physical description & handling notes

• Colorless liquid; [HSDB]
• Colorless liquid
• Slightly soluble in ethanol and ether; soluble in acetone and chloroform
• Polymerizes gradually.
• Index of refraction: 1.4935 at 20 °C
• Heat of formation = 51.6 kJ/mol (liq); 82.0 kJ/mol (gas). Gibbs free energy = 96.8 kJ/mol (gas). Entropy = 255.2 J/molK (gas)

GHS Hazard Classification

Reported hazard statements	H225 (100%), H301 (100%), H318 (97.6%), H331 (97.6%), H320, H370

Documented Uses

• Used as a chemical intermediate; [HSDB]
• ...SYNTHESIZED BY REACTION OF 2-HALOETHYLTHIOCYANATES WITH SODIUM SULFIDE. OTHER METHODS...INCL...(1) REACTION OF ETHYLENE CARBONATE WITH SODIUM OR POTASSIUM THIOCYANATE; (2) REACTION OF ETHYLENE MONOTHIOCARBONATE WITH SODIUM CARBONATE... ...METHODS OF SYNTHESIS INCL...(3) REACTION OF ETHYLENE OXIDE WITH THIOUREA, INORGANIC THIOCYANATES OR CARBONYL SULFIDE.
• PROBABLY BY REACTION OF ETHYLENE OXIDE WITH POTASSIUM THIOCYANATE OR THIOUREA IN AQUEOUS SOLUTION
• (1979) NO EVIDENCE OF COMMERCIAL PRODN IN U.S.
• (1981) NO EVIDENCE OF COMMERCIAL PRODN IN U.S.

Synonyms

Thiirane; ETHYLENE SULFIDE; 420-12-2; Thiacyclopropane; Ethylene sulphide; 2,3-Dihydrothiirene; Sulfurane; Thiiran; Ethylene episulfide; Ethylene episulphide; Aethylensulfid; Thiirene, 2,3-dihydro-; DTXSID3049411; A2W5165740; NSC-89690; DTXCID2029371

Frequently Asked Questions

What are the CAS number and molecular formula of Ethylene sulfide?

CAS 420-12-2; molecular formula C2H4S; molecular weight — g/mol.

What other names is Ethylene sulfide known by?

Thiirane, ETHYLENE SULFIDE, 420-12-2, Thiacyclopropane, Ethylene sulphide, 2,3-Dihydrothiirene.

Is Ethylene sulfide classified as hazardous?

Hazard statements reported: H225, H301, H318, H331, H320.

What are the key physical properties of Ethylene sulfide?

Boiling Point: decomposes at 57 °C; Melting Point: -109 °C; Density: 1.0130 g/cu cm at 20 °C; Vapor Pressure: 250.0 [mmHg].

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.