Sodium formaldehyde bisulfite

Sodium formaldehyde bisulfite (CAS 870-72-4), also known as sodium hydroxymethanesulfonate or SFB, is an adduct compound that functions as a controlled formaldehyde releaser and reducing agent.

Where is Sodium formaldehyde bisulfite used?

• Water treatment: biocide controlling microbial growth in cooling towers, industrial process water and oilfield injection systems
• Textile and leather processing: reducing agent and fixative in dyeing operations
• Personal care: preservative in rinse-off products where low-level formaldehyde release is permitted
• Pharmaceutical manufacturing: excipient and reducing agent in drug formulations and API synthesis steps
• It slowly releases formaldehyde under specific conditions, serving as a preservation and biocide active where direct formaldehyde use is restricted.

Good to know: Handle according to safety protocols to ensure stability and efficacy.

Commercial specifications

• Technical grade and higher-purity grades for pharmaceutical and personal care use
• Bulk quantities in bags or drums