Sodium Formaldehyde Bisulfite
Formaldehyde Sodium Bisulfite Adduct, Hydroxymethanesulfonic Acid Sodium Salt.
- CAS
- 870-72-4
- EC
- 212-800-9
- Sectors
- Textiles, Leather & Paper, Pharma & Healthcare
Sodium Formaldehyde Bisulfite (CAS 870-72-4) is a white to almost white crystalline powder, an adduct of formaldehyde and sodium bisulfite that releases formaldehyde and bisulfite ions in a controlled manner, and it is used as a reducing agent, textile dye-stripping agent, and pharmaceutical antioxidant and intermediate. This Technical Grade compound is prized for its ability to release formaldehyde and bisulfite ions in a controlled manner during reactions.
In the textile industry, it serves as a powerful bleaching agent and stripping tool for removing dyes from fabrics. Its high solubility and precise chemical behavior allow for uniform treatment of fibers, ensuring high-quality results in large-scale dyeing operations.
The material is also used in the pharmaceutical sector as an antioxidant and stabilizer for sensitive drug formulations. Its versatile reactivity makes it an essential building block for synthesizing specialty organic compounds and advanced resin systems.
Typical Properties
| Molecular formula | CH4O4S.Na |
|---|---|
| Molecular weight | 134.09 g/mol |
| Appearance | white to almost white powder |
| Form | Powder |
| Color | White to almost white |
| Melting point | 200 °C (dec.) |
| Water solubility | 800 g/L (20 °C) |
| Flash point | 184 °C |
| HS code | 29055900 |
| Grades available | Technical Grade |
Typical literature values for identification; lot-specific results are stated on the certificate of analysis (COA) and the safety data sheet (SDS) that accompany every delivery.
Sodium Formaldehyde Bisulfite
Applications
- [Textile Stripping]: Effectively removes excess or uneven dyes from natural and synthetic fibers to allow for re-dyeing or bleaching.
- [Chemical Synthesis]: Acts as a source of hydroxymethanesulfonate in the production of complex pharmaceutical intermediates and resins.
- [Photography]: Utilized in the formulation of photographic developers to prevent the oxidation of active developing agents.
Safety & Risks
May cause Skin Sensitization and Respiratory Irritation upon exposure; avoid contact with strong acids. Wear Nitrile Gloves, Safety Glasses, and Dust Protection during handling.
Packaging
Standard packaging in 25 kg Bags and Fiber Drums with moisture-proof liners.