China Chemicals Sodium Formaldehyde Sulfoxylate Rongalite 40% Solution CAS 149-44-0, Find details about China 149-44-0, Sodium Formaldehyde Sulfoxylate Rongalite from China Chemicals Sodium Formaldehyde Sulfoxylate Rongalite 40% Solution CAS 149-44-0
Indicator name | Indicator |
Sodium bisulfate formaldehyde content%>= | 40%,98% |
Dissolved state | Soluble in water was clear or slightly cloudy |
Sulfide | Not black |
odor | No smell or little leek flavor |
use | Synthetic rubber, sugar, food industry as bleach |
Heat of Fusion | 54.84 KJ/mol( 13.2Kcal/mol) |
Hygroscopic Point | Relative Humidity 60% |
Solution | clear or sight turbid |
Smell | No smell or a little smell of leek |
45%(20 °C):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.
Presenting a powerful reduction behaviour, it acts as a salt of alkaline protection.
a. Easy to deliquescent, emit heat, begin to decompose at 80°C, and sulfurated hydrogen H2S being release:
6NaHSO2·CH2O+3H2O - →4NaHSO3+2HCOONa+2H2S+HCOOH+3CH3OH
b.Decompose completely when the temperature rises to 110°C, the intramolecular formaldehyde are splitted out, and then nascent hydrogen which is possessed of the strongest reducing power are produced :
NaHSO2·CH2O -→ NaHSO2+ CH2O
NaHSO2 + H2O -→ NaHSO2+ 2[H]
c.Under the influence of acidity, decompose at PH >3, emit H2S, so that it sould be present in alkline medium PH >8.
d.Decompose on contacting oxidant, take I2 for example:
NaHSO2·CH2O+2H2O+2I2 -→ NaHSO4+4HI+CH2O
It is mainly used as a discharging agent, color-discharging agent, reductant in printing and dyeing industry, as an activating agent for production styrene-butadise rubber and synthetic resin, also be used to decolourize and bleach some organic matters, for example: as a bleaching agent in synthetic rubber, sugar-making, and food industries. It may be substituted for the sodium hydrosulfite in some special conditions.