Sodium polysulfide
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Sodium polysulfide is a general term for salts with the formula Na2Sx, where x = 2 to 5. The species Sx2−, called polysulfide anions, include disulfide (S22−), trisulfide (S32−), tetrasulfide (S42−), and pentasulfide (S52−). In principle, but not in practice, the chain lengths could be longer.[1][2] The salts are dark red solids that dissolve in water to give highly alkaline and corrosive solutions. In air, these salts oxidize, and they evolve hydrogen sulfide by hydrolysis.
Quick Facts Names, Identifiers ...
Sodium pentasulfide, a representative component of sodium polysulfide | |
Names | |
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Other names
Sodium sulfane; Viradon | |
Identifiers | |
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3D model (JSmol) |
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ChemSpider |
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ECHA InfoCard | 100.014.261 |
EC Number |
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PubChem CID |
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UN number | UN3266 |
CompTox Dashboard (EPA) |
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Properties | |
Na2Sx | |
Hazards | |
GHS labelling: | |
Danger | |
H228, H301, H311, H314, H400 | |
P210, P240, P241, P260, P264, P270, P273, P280, P301+P310, P301+P330+P331, P302+P352, P303+P361+P353, P304+P340, P305+P351+P338, P310, P312, P321, P322, P330, P361, P363, P370+P378, P391, P405, P501 | |
NFPA 704 (fire diamond) | |
Flash point | Non-combustible |
Safety data sheet (SDS) | AGFA |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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