Sodium Hydroxymethylsulfinate
Rongalite, Sodium Formaldehyde Sulfoxylate, SFS.
- CAS
- 149-44-0
- EC
- 205-739-4
- Sectors
- Textiles, Leather & Paper, Plastics & Polymers, Rubber & Elastomers
Sodium Hydroxymethylsulfinate (CAS 149-44-0), also known as Rongalite, is a Technical Grade sulfoxylate salt that appears as a white to off-white solid with a minimum purity of 98%, used mainly as a discharge printing agent in textiles and as a redox catalyst in emulsion polymerization. It is highly stable at room temperature but releases sulfoxylate radicals at elevated temperatures, making it ideal for controlled reactions.
The product features high purity (min 98%) and is primarily used in discharge printing on textiles. It ensures sharp patterns and excellent color removal without damaging the integrity of the base fabric.
In the polymer industry, it acts as a redox catalyst in emulsion polymerization. It allows for the production of synthetic rubber and resins at lower temperatures, enhancing product quality and process efficiency.
Typical Properties
| Molecular formula | CH4O3S.Na |
|---|---|
| Molecular weight | 118.09 g/mol |
| Appearance | solid |
| Form | Solid |
| Color | White to Off-White |
| Odor | Mild garlic odor |
| Melting point | 63-64 °C |
| Density | 1.744[at 20°C] |
| Water solubility | soluble H2O, alcohol [HAW93] |
| Flash point | >100°C |
| pH | 9.5-10.5 |
| GHS signal word | Warning · Health hazard |
| HS code | 2930909899 |
| 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 Hydroxymethylsulfinate
Applications
- Textile Printing: Used as a discharge agent to remove background colors and create intricate white or colored patterns.
- Polymerization: Functions as a reducing component in redox initiator systems for SBR and ABS plastics.
- Redox Titration: Employed in specialized chemical analysis as a stable reducing reagent.
Safety & Risks
Classified as Suspected Mutagen and Toxic to Reproduction. Handle with Respirators, Safety Goggles, and Protective Aprons; avoid contact with acids.
Packaging
Packed in 25 kg or 50 kg Iron Drums with PE liners.