149-44-0 Sodium Formaldehyde Sulfoxylate Rongalite C for Textile Auxiliary

• Customization: Available
• CAS No.: 149-44-0
• Formula: CH2(Oh)So2na
• Model NO.: Sodium formaldehydesulfoxylate dihydrate
• EINECS: 205-739-4
• Certification: CCIC, CIQ, RoHS, ISO
• Purity: 90%~99%
• Type: Sodium Formaldehydesulfoxylate Dihydrate
• Appearance: Platy
• Grade Standard: Industrial Grade
• Flash Point: 223.8 ºC
• Security Description: S26 S36
• Hazard Symbol: R36/37/38
• Hazard Description: Xi
• Boiling Point: 446.4ºC
• Transport Package: 50kg/Drum
• Specification: 98%
• Trademark: Dadao
• Origin: China
• HS Code: 2831900000
• Production Capacity: 5000mt/Month

Product Description

 149-44-0 Sodium Formaldehyde Sulfoxylate Rongalite C for Textile auxiliary

1. Nature:
Chemical name: Sodium formaldehydesulfoxylate dihydrate/Rongalite C
Sub-formula: NaHSO2·CH2O·2H2O
MW: 154.12
Specific weight: 1.8
melting point: 64ºC
Heat of fusion: 54.84KJ/mol (13.2KCal/mol)
Moisture absorption point: 60% relative humidity
Stable point: less than 50ºC
Solubility: at 20ºC, 1 part of Rongalite C lump, Rongalite C powder and Rongalite C granules needs 1.2 part of water to dissolve (45%); at 70ºC, 1 part of Rongalite C block, Rongalite C powder and Rongalite C granules needs 1 part of water to dissolve (50%).

2 Product Picture: 

3 Physical properties:
Rongalite C(Block,powder,granular) particles are salts with strong reducibility, and white condensed blocks or powder or granules are protected by alkali.

4 Chemical properties:
A.The Rongalite C block (powder, grain) is easy to get damp and release heat, and it begins to decompose at 80ºC, releasing H2S, which needs to be dried and stored at low temperature. 6NaHSO2·CH2O+3H2O - →4NaHSO3+2HCOONa+2H2S+HCOOH+3CH3OH

B. When the temperature rises to 110ºC, the Rongalite C block (powder, grain) is completely decomposed, and formaldehyde in the molecule splits to release new [H], with the strongest reducing power. NaHSO2·CH2O -→ NaHSO2+ CH2O NaHSO2 + H2O -→ NaHSO2+ 2[H]

C. Rongalite C block (powder, grain) decomposes when it meets oxidant, such as I2. NaHSO2·CH2O+2H2O+2I2 -→ NaHSO4+4HI+CH2O D. The Rongalite C block (powder and granule) should be in alkaline medium with PH>8, and acidity (acid limit PH>3) can make the Rongalite Cblock decompose hydrogen sulfide.

Quality standard, implementation standard HG 2281-1992 Index name Index sodium bisulfite formaldehyde content% ≥ 98.00.
Dissolved in water, clear or slightly turbid sulfide does not have black smell, no smell or a little chive smell.

5 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

6. Packaging:
Packaging with tightly sealed iron drums lined with plastic film bags. The net weight of each barrel is 50 kg.

7. Uses:
It is mainly used in printing and dyeing industry as discharge agent, discharge agent, reducing agent and activator of styrene-butadiene rubber and synthetic resin, and also used for decolorization and bleaching of some organic matters (such as synthetic rubber, sugar making and food industry as bleaching agent), which can be used instead of sodium hydrosulfite under certain specific conditions. Can not be used for imported food bleaching.

8. Transportation and storage:
Should be stored in a dry and cool place to prevent sunlight exposure and rain, and should not be mixed with oxidants and acids.
The storage room does not contain acid vapor, and the storage period is one year.