Basic Information
Other Names: SFS; Rongalite C; Sodium Formaldehyde Sulfoxylate 
Molecular Formula: NaHSO2.CH2O.2H2O
Molecular Weight: 154.12
CAS NO.: 6035-47-8
EINECS NO.: 205-739-4
H.S. CODE NO.: 28311020
Standard: HG/T2281-2006
Purity: 98% min.
Physicochemical Properties
1.Appearence: White lumps or powder
2.Melting Point: 64℃
3.Melting Heat: 54.84 KJ/mol (13.2KCal/mol)
4.Density: 1.8 g/cm3
5.Hygroscopic Point: Relative Humidity 60%
6.Stable Point: ＜50℃
7.Water Solubility: 500-600 g/l at 20 ℃ ± 0.5℃ （DECD 105)
Technical Specifications
Item
| Specification | Testing Results
|
| NaHSO2·CH2O Content% | 98% min. | 99.12% |
| State of Solution | Be soluble in water and appear in clarification or microturbidity | Complete soluble
|
| Sulphide | Not in dark | Not in dark |
| Alkalinity as sodium carbonate | 3.0% max. | 1.5% |
| Odor | Slight | Slight |
| Cu & Mn | 5ppm max. | 3ppm |
Packaging Types
50kg iron drum; 25kg bag or as per customers' requirement
Applications
Mainly used as a discharging agent, color-discharging agent, reductant in printing a dyeing industry.
Also used as an activating agent for production styrene-butadise rubber and synthetic resin.
Also used to decolourize and bleach some organic matters, for example: as a bleaching agent in synthetic rubber, sugar-making, and food industry.
Substituted for Sodium Hydrosulfite in some special cases.
Storage Information
Stored in a dry, cool and dark place. Protected from moisture and avoided exposure to direct sunshine. Don’t to let it be rained on. Be sure not to store it together with oxidant and acid, no presence of acidic vapour in storage.
