Rongalite lump,Rongalite powder, Rongalite granules are of a sort but in different forms,their chemical composition is all the same. Three types of Rongalite product are supplied to meet customer's demands in application.
1.Properties:
Chemical Name : Sodium Formaldehyde Sulfoxylate
Commercial Name : Rongalit C
Molecular Formula : NaHSO₂·CH₂O·2H₂O
Molecular Weight : 154.12
Specific Gravity :1.8
Melting Point : 64ºC
Heat of Fusion :54.84 KJ/mol( 13.2Kcal/mol)
Hygroscopic Point : Relative Humidity 60%
Stable Pour-Point :50ºC max
45%(20 ºC):1.2 dose of water is necessary for dissolving away 1 dose of Rongalite at 20ºC. 50%(70 ºC):1 dose of water is necessary for dissolving avay 1 dose of Rongalite at 70ºC.
Physical Properties:
To be nominated for Rongalite is for the reason that it serves the color-discharging functionto fabrics as well as its appearance. Under different cooling conditions, it solidfies out into white lumps, powder, or granules.
Chemical Properties:
Presenting a powerful reduction behaviour, it acts as a salt of alkaline protection.
a. Easy to deliquescent, emit heat, begin to decompose at 80ºC, and sulfurated hydrogen H₂S being release:
6NaHSO₂·CH₂O+3H₂O - →4NaHSO₃+2HCOONa+2H₂S+HCOOH+3CH₃OH
b.Decompose completely when the temperature rises to 110ºC, 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
2. Standard: up to the Standard HG 228I-1992
Specifications:

3.Packing:
In plastic bag Net weight: 25kgs each.
4. Purpose:
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.
5. Attention:
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 storeroom is allowed. Storage life is one year.