Sodium Hydroxymethanesulphinate CAS#149-44-0
Strong Reducing Ability：Exhibits extremely powerful reducing properties at elevated temperatures, making it highly effective for decolorization and bleaching applications.
High Water Solubility：Easily dissolves in water, allowing for convenient preparation and efficient use in aqueous processing systems.
Stable Solid Form：The anhydrous solid form remains relatively stable under dry conditions, ensuring ease of storage and handling.
Effective Whitening Performance：Well known for its strong color-removal capability, it is widely used where rapid and efficient whitening or color stripping is required.
Products Description of Sodium Hydroxymethanesulphinate CAS#149-44-0
Sodium bisulfite formaldehyde appears as translucent white orthorhombic crystals or small granules, with an apparent density of 1.80–1.85 g/cm³. It is readily soluble in water and slightly soluble in alcohol. Under high temperatures, it exhibits very strong reducing properties and is capable of removing dyed colors, which is why it is commonly known as a “hanging white block.” The compound decomposes in acidic conditions and breaks down at around 120 °C, releasing toxic gases such as formaldehyde and hydrogen sulfide. While the anhydrous solid form is relatively stable, it will slowly decompose in humid air. Its aqueous solutions begin to decompose above 60 °C, with dilute solutions decomposing more rapidly than concentrated ones.
Sodium hydroxymethanesulphinate Chemical Properties
| Melting point | ~120 °C (dec.) |
| Density | 1.744[at 20℃] |
| Vapor pressure | 0.003Pa at 20℃ |
| Fp | >100℃ |
| Storage temp | Inert atmosphere,Room Temperature |
| Solubility | H2O: 50 mg/mL, clear, colorless |
| Form | Solid |
| Color | White to Off-White |
| PH | 9.5-10.5 |
| Water Solubility | soluble H2O, alcohol [HAW93] |
| Merck | 148,620 |
| Stability | Stable. Incompatible with strong oxidizing agents. |
| LogP | -3.4 at 22℃ |
| EPA Substance Registry System | Sodium sulfoxylate formaldehyde (anhydrous) (149-44-0) |
Safety Information
| Hazard Codes | Xi,Xn |
| Risk Statements | 36/37/38-68-31 |
| Safety Statements | 26-36-36/37 |
| WGK Germany | 1 |
| RTECS | PB0380000 |
| TSCA | Yes |
| HS Code | 2930909899 |
| Hazardous Substances Data | 149-44-0(Hazardous Substances Data) |
Product Application of Sodium Hydroxymethanesulphinate CAS#149-44-0
It is primarily used in the printing and dyeing industry as a dye discharge agent, stripping agent, reducing agent, and as an activator for styrene-butadiene rubber and synthetic resins. In addition, it is applied in the decolorization and bleaching of certain organic substances, such as in the synthetic rubber, sugar, and food industries. Under specific conditions, it can serve as a substitute for insurance powder.
