RONGALITE

Rongalite lump, Rongalite powder, Rongalite granules are of a sort but in different form, 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:Rongalite
Molecular Formula:NaHSO2¡¤CH2O¡¤2H2O
Molecular Weight:154.12
Specific Gravity:1.8
Melting Point:64¡æ
Heat of Fusion:54.84KJ/mol(13.2Kcal/mol)
Hygroscopic Point:Relative Humidity 60%
Stable Pour-Point:50¡æmax

Solubility:¡¡45%(20¡æ):1.2 dose of water is necessary for dissolving away l dose of Rongalite at 20¡æ. 50%(70¡æ);1 dose of water is necessary for dissolving away 1 dose of Rongalite at 70¡æ.

-Physical Properties:
¡¡¡¡To be nominated for Rongalite is for the reason that it serves the color-discharging function to fabrics as well as its appearance. Under different cooling conditions, it solidifies 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 80¡æ, and sulfurated hydrogen H2S being release;
6NaHSO2¡¤CH20+3H2O---4NaHSO3+2HCOONa+2H2S+HCOOH+3CH3OH
b.Decompose completely when the temperature rise to 110¡æ. 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-NaHSO3+2(H)
c.Under the influence of acidity, decompose at PH>3, emit H2S, so that it should be present in alkaline medium PH>8.
d.Decompose on contacting oxidant, take 12 for example:
¡¡¡¡NaHSO2¡¤CH2O+2H2O+2l2--NaHSO4+4Hl+CH2O

2.Standard:Up to the Standard HG2281-92
Specifications:

3.Applications:
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.

4.Packing:
In plastic bags-lined iron drum, sealed with airtight lid, net weight 50kg each.

5.Cautions for transportation and storage:
Should be stored in a cool, dark and dry 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.