Sodium Sulphide
Na₂S | CAS: 1313-82-2 | HS: 28301000
Product Description
Sodium Sulphide is an essential reducing and dehairing chemical in leather processing and an important intermediate in dyes manufacturing and ore flotation. In tanneries, its primary function is unhairing of hides — breaking down keratin disulphide bonds to dissolve hair from the hide surface in lime/sulphide liming baths. In sulfur dye synthesis, it provides the sulphur source and reducing environment for producing insoluble sulphur dyes that are reduced to leuco form for application to cotton. MITCHEM supplies with full hazardous goods documentation for regulated industrial users.
Applications by Industry
Mixed with lime in liming baths for chemical dehairing of cattle and sheep hides — Na₂S cleaves disulphide bonds in keratin, dissolving hair and opening the hide structure for tanning.
Provides the sulphur and reducing environment for synthesis of sulphur vat dyes applied to cotton — reacts with organic intermediates under alkaline conditions to form insoluble sulphur dye structures.
Used as a sulphide mineral surface modifier and depressant in selective flotation of complex sulphide ores — selectively depresses sphalerite (ZnS) and galena (PbS) in differential flotation.
Applied as a reducing agent for the reduction of aromatic nitro compounds to amines, and in the synthesis of thiols, thioethers, and other sulphur-containing organic compounds.