Model Number: HMHT0033-8
Other Name: SFS; Rongalite C; Sodium Formaldehyde Sulfoxylate；Sodium formaldehyde sulfoxylate；Sodium formaldehyde disulfite dihydrate；Sodium Hydroxymethanesulfinate；Sodium Hydroxymethylsulfinate Dihydrate；Sodium Hydroxymethyl Sulfinate；sodium sulfite formaldehyde
Molecular formula: CH6Na2O5S
Surface density: 1.80～1.85 g/cm3
Flash point: 223.8 ℃
Molecular weight: 176.1
Sodium formaldehyde sulfoxylate (chemical formula: CH3NaO3S), commonly known as hanging white block, carving white powder, carving white powder C, is an adduct formed by formaldehyde and sodium sulfoxylate.
|Flash point||223.8 ℃|
|Application||Industrial bleach; reducing agent|
|Security description||S26; S36|
|Solubility||easily soluble in water, insoluble in absolute ethanol, ether and benzene.|
|Features||It has strong reducibility at high temperature. Has fading properties.|
|Temperature resistance||It decomposes at high temperature to produce toxic gases such as formaldehyde and hydrogen sulfide.|
|Acid resistance||it decomposes when it encounters dilute acid, and its solution is neutral.|
|Melting point||63～64 ℃.|
|Surface density||1.80～1.85 g/cm3|
We can provide 25kg bag; 50kg iron drum or as per customers' requirement
Add 286 kg of zinc powder and 500 kg of water into the beating tank, and after pulping, add it to the shell-and-tube reactor, and absorb about 550 kg of SO2 to obtain zinc hydrosulfite (the reaction temperature is maintained at 40-45 °C, and the end point is pH value is 3 to 3.5).
In addition, the formaldehyde of 698 kg 40% is added in the reactor, the above-mentioned zinc hydrosulfite aqueous solution is added dropwise under stirring, and gradually heat up, when the temperature rises to 95～100 ℃, add a total of 257 kg of zinc powder in batches, react under the insulation For several hours, the end point is less than 1% unreacted substance. The precipitate was left to stand, and the precipitate was transferred to a displacement kettle. After washing with clean water, 755 kg of 42% sodium hydroxide solution was added under stirring. The reaction was carried out at 65°C until the free base content reached 0.3% to 0.5%. The reactants were filtered to remove impurities, and the filtrate was clarified for 48 h and concentrated in vacuo. Cool to crystallize and pulverize to get the finished product.
Stored in a dry, cool, and dark place.
Wuxi High Mountain Hi-tech Development Co., Ltd is a professional industrial company engaged in special
chemical production, technology research & development, and import & export. The company focuses on the
production, trade, and research & development of various chemical products.
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