Sodium disulfide

HCID 89870CAS 22868-13-9

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Basic information

Standard SMILES: [Na+].[Na+].[S-][S-]
InChIKey: SRRKNRDXURUMPP-UHFFFAOYSA-N
Molecular formula: Na2S2
Average molar mass: 110.11 g/mol
Monoisotopic mass: 109.92368056

Names & identifiers

Preferred name: Sodium disulfide
IUPAC: Disodium disulfide
English name: disodium disulphide
Molecular formula: Na2S2
Molecular weight: 110.11

Names & synonyms

Sodium disulfide22868-13-9Sodium sulfide (Na2(S2))EINECS 245-272-3UNII-B20OMA37AHB20OMA37AHdisodium disulfideRefChem:183875DTXCID0029898SODIUM SULFIDE (NA2S2)DTXSID40873992245-272-3

Show more names

Disodio persulfideSodium disulfide, anhydrous

Disodium disulphideNa2S2SCHEMBL31606742

Database identifiers

CAS: 22868-13-9
PubChem CID: 89870
DTXSID: DTXSID40873992
EC Number: 245-272-3
Nikkaji: J286.328F

Properties

Computed structural properties

Topological polar surface area: 2 Å²
Hydrogen bond donors: 0
Hydrogen bond acceptors: 2
Rotatable bonds: 0
Heavy atoms: 4
Formal charge: 0
Complexity: 4

Physicochemical properties

Melting point: 495 °C · 495 °C
Density: 2.01 g · 2.01 g cm-3
solubility: readily sol water; sol ethanol.
FDA UNII: 20 OMA37AH · B20OMA37AH
EPA Substance Registry System: Sodium sulfide (Na2(S2)) (22868-13-9)
TSCA: TSCA listed

Safety & regulation

Safety data

tsca: TSCA listed

Chemistry & industry

Uses & manufacturing

General Manufacturing InformationSodium sulfide (Na2(S2)): INACTIVE

Applications

UsesDisodium disulphide is used as a nucleophilic agent for synthesis of organic disulfides and selective reducing reagent for the nitro group.[1-3]

Preparation methods · 1 item

PreparationDisodium disulphide (Na2S2) preparations are cumbersome and sometimes afford mixtures containing the polysulfides Na2S4 and Na2S5. They involve reduction of Sulfur with Sodium in liquid ammonia, heating Na with S in a vacuum at 500 °C, or heating Na2S4 with Na in absolute ethanol under inert gas.[4-5] Na2S2 is formed in situ by heating the aqueous or alcoholic Sodium Sulfide solution with elemental sulfur.[6-9]