Sodium polysulfide

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Sodium polysulfide
CAS number 1344-08-7
UN number UN3266
Jmol-3D images Image 1
Molecular formula Na2Sx
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 noted otherwise, 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.