Sodium formaldehyde sulfoxylate dihydrate

Sodium formaldehyde sulfoxylate dihydrate (CAS 6035-47-8 ), commonly known as SFS, is a reducing agent used industrially for bleaching and stripping color from substrates.

Rongalite is a recognized trade name under which this product is frequently sourced in textile and paper markets. In textile processing, SFS is used as a discharge agent to remove dye.

This enables precise pattern creation without damaging fiber structure. Pulp and paper manufacturers apply it as a bleaching agent to brighten mechanical and chemical pulps where milder conditions are required.

Leather processors use SFS to achieve uniform whitening of hides prior to dyeing, improving final color consistency. It also functions as a reductive stripping agent in vat and sulfur dye systems.

This allows for color correction and re-dyeing of off-shade goods. Sodium formaldehyde sulfoxylate dihydrate is supplied as a white crystalline powder or granules for various industrial uses.

Standard commercial grades are available for industrial and technical applications, with purity specifications typically ranging from 95% to 98% active content for high performance.

Packaging is commonly offered in 25 kg bags or drums, with bulk options available for large-scale industrial procurement. This ensures reliable supply chains for global manufacturing operations.

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