Sodium polysulfide

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Sodium polysulfide
Other names
Sodium sulfane; Viradon
Jmol-3D images Image
UN number UN3266
Safety data sheet AGFA
NFPA 704
Flammability code 0: Will not burn. E.g., water Health code 3: Short exposure could cause serious temporary or residual injury. E.g., chlorine gas Reactivity code 1: Normally stable, but can become unstable at elevated temperatures and pressures. E.g., calcium Special hazards (white): no codeNFPA 704 four-colored diamond
Flash point Non-combustible
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Sodium polysulfide is a general term for a chemical with the notation Na2Sx where the "x" refers to a variable number of sulphur atoms in the molecules that make up the mixture, including disulfide, trisulfide, and tetrasulfide possibilities. It is produced through a reaction of aqueous sodium hydroxide with sulphur at elevated temperatures.[1] It is highly alkaline and extremely corrosive. It is used in the production of polysulfide polymers, as a chemical fungicide, as a blackening agent on copper jewellery, as a component in a polysulfide bromide battery, as a toner in a photochemical solution, and in the tanning industry to remove hair from hides.


  1. ^ Lee, T.C.P. (1999). Properties and applications of elastomeric polysulfides. Rapra Technology. p. 4. ISBN 978-1859571583.