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
CAS: 6035-47-8
Surface density: 1.80～1.85 g/cm3
Flash point: 223.8 ℃
Molecular weight: 176.1
Physicochemical Properties
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.
Technical Specifications
| EINECS | 205-739-4 |
| CAS | 6035-47-8 |
| Molecular formula | CH6Na2O5S |
| Molecular weight | 176.1 |
| Flash point | 223.8 ℃ |
| Application | Industrial bleach; reducing agent |
| Security description | S26; S36 |
| Hazard symbol | R36/37/38 |
| Hazard Description | Xi |
| Solubility | easily soluble in water, insoluble in absolute ethanol, 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 |
Packaging Types
We can provide 25kg bag; 50kg iron drum or as per customers' requirement
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Applications
Production Process
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.
Storage/Transport Information
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.
Since its establishment, the company has been concentrating on constructing an international marketing
network and optimizing supply chain management, where we have established a long-term strategic
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Relying on our wide business channels and professional experience, we are more skillfully
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together with you!
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