Ammonium sulfite

Ammonium sulfite (CAS 10196-04-0), also referenced as diammonium sulfite, is an inorganic salt used industrially as a reducing and oxygen-scavenging agent. It functions primarily as a preservative and process chemical.

In pulp and paper processing, it acts as a delignification aid, helping break down lignin during chemical pulping to improve fiber yield and paper quality. This ensures high-performance material output.

Textile and leather operations use it as a reducing agent in dyeing and tanning processes. Controlled reduction chemistry is critical to achieving consistent color and material finish across large production batches.

In water treatment, it serves as an oxygen scavenger to protect boiler systems and pipelines from oxidative corrosion. This application is vital for maintaining the longevity of industrial infrastructure and equipment.

Food and nutrition applications include its use as a preservative and antioxidant to inhibit microbial growth. It prevents oxidative degradation in certain processed food products to maintain shelf stability and safety.

Ammonium sulfite is typically supplied as a white crystalline powder or in aqueous solution form. Technical grade is the most common specification for industrial applications requiring high-volume chemical processing.

Food-grade material is available for use in regulated food processing environments. Buyers should confirm purity levels and solution concentration with suppliers, as these vary significantly by the intended application.

Compliance with international quality standards such as FCC or USP may be required depending on the region. Always review the technical data sheet to ensure the material meets your specific requirements.