Chemical name: Sodium Formaldehyde Sulfoxylate
Commercial name: Rongalite
Molecular Formula: NaHSO2.CH2O.2H2O
Molecular Weight: 118.0875
Specific Gravity: 1.8
Melting point: 64ºC
Stable Pour-Point: 50 ºC max 45% (20 ºC): 1.2 dose of water is necessary for dissolving away 1 dose of Rongalite at 20°C. 50%(70°C):1 dose of water is necessary for dissolving avay 1 dose of Rongalite at 70°C
Specification
| Item | Standard | Result | Conclusion |
| NaHSO2.CH2O.2H2O | ≥98.0% | 99.2% | Pass |
| Solution | Clear or shight turbid | Slight turbid | Pass |
| No black | No black | Pass | |
| Appearance | White powder | White powder | Pass |
| Cu content | / | / | / |
| Mn content | / | / | / |
| Solubility in benzene | Insoluble | Insoluble | Pass |
| Conclusion | First class product | ||
Application
1) Dyeing and printing industry used as cotton, rayon, staple fiber fabrics, such as the extraction agent, reducing dyes.
2) The preparation of synthetic resin and synthetic rubber is used as redox catalyst.
3) Also used as antidote, sugar bleach, descaling agent, detergent and for the preparation of indigo dyes, VAT dyes and so on.
4) Sodium hydrogen sulfate is one of the most used reducing agents in the discharge printing, which can make the dyed color disappear.
Storage
Should be stored in a dry, cool and dark place. Protected from moisture, 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 life is one year.
