Chromium bisulfate

Chromium bisulfate (CAS 39380-78-4), also supplied as basic chromium sulphate, is an inorganic chromium salt used across tanning, textile processing, and metal surface treatment. It functions primarily as a fixative and surface-modifying agent.

This chemical enables durable bonding between substrates and subsequent treatment layers. In leather manufacturing, it is the principal tanning agent in chrome tanning processes, producing soft, heat-stable hides with consistent dyeability.

Textile processors use it as a mordant to fix dyes onto natural fibers, improving wash and light fastness in finished fabrics. Metal surface treatment operations apply it to condition and prepare substrates prior to plating or coating.

These applications promote adhesion and corrosion resistance in industrial settings. In mining and hydrometallurgical processes, it supports selective precipitation and separation steps where controlled chromium chemistry is required.

Chromium bisulfate is available as a powder or granular solid, with granular forms preferred for handling and dissolution in industrial operations. Supply grades include technical-grade material specified by chromium oxide content.

This content is typically expressed as Cr₂O₃ percentage, a standard metric for tannery procurement. Bulk packaging in bags or supersacks is the norm for high-volume industrial buyers seeking consistent chemical performance.