Zinc formaldehyde sulfoxylate

Zinc formaldehyde sulfoxylate (CAS 24887-06-7), also known as zinc bis(hydroxymethanesulphinate), is an inorganic reducing salt used industrially as a bleaching and stripping agent. It functions by releasing active reducing species under heat or alkaline conditions.

This chemical enables controlled decolorization and whitening in various wet processing operations. In textile dyeing and finishing, it serves as a discharge agent to selectively remove or reduce dye from fabric, enabling resist and discharge printing effects.

Leather processing operations use it to bleach hides and control oxidative discoloration during tanning. Pulp and paper manufacturers apply it to brighten mechanical pulps and reduce yellowing in finished paper grades to improve final product quality.

Water treatment applications use it as a reducing agent to neutralize residual oxidants such as chlorine and chromate compounds in industrial effluent streams. This ensures that wastewater meets environmental standards before discharge into local systems.

Zinc formaldehyde sulfoxylate is typically supplied as a white to off-white powder or granular solid. Technical grade is the standard commercial form, with purity specifications commonly ranging from 90% to 98% active content for industrial use.

Packaging is generally available in 25 kg bags or bulk quantities suited to industrial procurement volumes. The material should be stored in a cool, dry place to maintain its chemical stability and effectiveness over long periods of time.