Sodium Hydroxymethanesulphinate

Sodium formaldehyde hyposulfate is an inorganic compound. It is a white crystalline solid that is soluble in water. Sodium formaldehyde hyposulfate has certain oxidizing and reducing properties.

Sodium formaldehyde hyposulfite is stable at room temperature, but will decompose at high temperatures, humidity, or in contact with strong acids. It can be reduced to sodium sulfite and formaldehyde by oxidizing agents chloric acid and hydrogen peroxide. Sodium formaldehyde hyposulfite can also be oxidized to sulfonal by the oxidizing agent chlorine gas.

Sodium formaldehyde hyposulfite is reductive and can react with some oxidants such as chlorine or chloric acid to reduce to sodium sulfite and formaldehyde.

Sodium formaldehyde hyposulfate is often used as dehydrating agent and reducing agent in some organic synthesis reactions. It can reduce aldehydes or ketones to their corresponding alcohols. Sodium formaldehyde hyposulfite can also be used in the synthesis of dyes and dye intermediates.

Specification : 

Chemical Name

Sodium formaldehydesulfoxylate dihydrate; Rongalite; Sodium hydroxymethanesulfinate

Commercial Name

RongaliteMolecular Weight

154.12

Specific Gravity

1.8

Melting Point

64°C

AppearanceWhite powder or white lumpGrade Standard

up to the Standard HG 228I-1992:Agriculture Grade, Electron Grade, Food Grade, Industrial Grade, Medicine Grade, Reagent Grade

Heat of Fusion

54.84 KJ/mol( 13.2Kcal/mol)

Hygroscopic Point

Relative Humidity 60%

Stable Pour-Point

50°C max

Solutionclear or sight turbid

M.F

NaHSO2.CH2O.2H2OContent of NaHSO2·CH2O % ≥

98.0

State of solubleness

Water solution clear or microturbid

SulphideNo presence of black color is allowed

SmellNo smell or a little smell of leek

ItemStandardResultConclusionNaHSO2.CH2O.2H2O≥98.0%99.2%PassSolutionClear or shight turbidSlight turbidPass

No blackNo blackPassAppearanceWhite powderWhite powderPassCu content///Mn content///Solubility in benzeneInsolubleInsolublePassConclusionFirst class product

Application ：

Printing and dyeing industry

In the printing and dyeing industry, hanging white block is commonly used as discharge agent and reducing agent for the production of indigo dye and VAT dye. It can make cotton, rayon, short fiber fabrics and other colors disappear, so it is named "carved white powder". ‌

Rubber industry

It is used in the rubber industry to prepare synthetic rubber and synthetic resins as a REDOX catalyst to help chemical reactions.

The following is the safety information of sodium formaldehyde hyposulfate:

Toxicity: Sodium formaldehyde hyposulfite has certain toxicity to the human body, which can cause irritation and burn the eyes, skin and respiratory tract. Exposure to high concentrations of sodium formaldehyde disulfite may cause symptoms such as red eyes, sore eyes, skin inflammation, and itching.

Inhalation: Inhalation of sodium formaldehyde sulfoxylate dust or solution vapors may cause respiratory irritation. When in contact with sodium formaldehyde sulfoxylate, care should be taken to avoid inhaling dust or solution vapors.

Ingestion: It is strictly forbidden to ingest sodium formaldehyde hyposulfate, because it is a toxic substance. If ingested, seek medical attention immediately.

Toxicology: The toxicity information of sodium formaldehyde hyposulfate to biological systems needs to be further studied.

Safe operation: When handling sodium formaldehyde hyposulfate, you should wear appropriate personal protective equipment, such as protective glasses, latex gloves, protective clothing, etc. Avoid direct contact with skin and eyes. If you come into contact with sodium formaldehyde sulfoxylate, rinse immediately with plenty of water and consult a professional.

Storage and disposal: Sodium formaldehyde hyposulfate should be stored in a dry, well-ventilated place, away from fire sources and combustible materials. Avoid contact with oxidizing agents and acidic substances to avoid dangerous reactions.