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sodium polysulfide
Sodium polysulfide is a general term for a chemical with the notation Na2S''x'' 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. 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.
==References==
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