Sodium dithionite CAS#7775-14-6

Strong Reducing Performance:Exhibits powerful reducing ability and high oxygen reactivity, enabling efficient bleaching, decolorization, and reduction processes.


Broad Industrial Applicability:Widely used across textiles, pulp and paper, water treatment, photography, polymers, leather, food and beverage processing, and chemical manufacturing.


Effective Oxygen Scavenging:Performs efficiently as an oxygen remover in boilers and industrial systems, helping to prevent oxidation and corrosion.


High Process Efficiency:Rapid reaction and conversion characteristics support fast processing, effective stain removal, and reliable performance in conservation, environmental remediation, and metal recovery applications.


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Product Description

Product Description of Sodium dithionite CAS#7775-14-6

Sodium dithionite, also known as sodium hydrosulfite, sodium hydrosulphite, sodium sulfoxylate, or sulfoxylate, is a strong reducing agent. It is unstable under physiological conditions, with decomposition accelerating in acidic environments. When exposed to moisture, it is oxidized to hydrogen sulfite, sulfite, and hydrogen sulfate, and under strongly acidic conditions may release sulfur dioxide. In anaerobic environments, hydrogen sulfite and thiosulfate can form. After ingestion, hydrogen sulfite may be absorbed, rapidly metabolized, and mainly excreted as sulfate in urine.

Owing to its strong reducing ability and high reactivity with oxygen, sodium dithionite is widely used across various industries. Its applications include textile dyeing, pulp and paper bleaching to remove yellowing from cellulose-based materials, oxygen scavenging in boilers, conservation for removing iron stains from cultural artifacts, and water treatment to control iron-related discoloration during bleaching. It is also used in photographic processing, clay and ceramic production, wine making, leather processing, food and beverage industries, polymer manufacturing, cleaning formulations, gas purification, environmental remediation, metal recovery, and chemical processing.


Product Application of Sodium dithionite CAS#7775-14-6

Sodium dithionite (sodium hydrosulfite) functions as a reducing agent, sulfonating agent, chelating agent and decolorizing agent in aqueous systems and organic reactions. It is widely utilized in water treatment, gas purification, cleaning formulations, leather processing, polymer manufacturing and photography. In chemical enhanced oil recovery, it stabilizes polyacrylamide polymers to prevent radical degradation induced by iron ions. It also serves a key role in soil chemistry for iron content determination.

Product Information

Parameters


Melting point300 °C
Boiling point1390°C
bulk density1250kg/m3
density2.13
Fp>100°C
storage temp.Store at +5°C to +30°C.
solubility250 g/L (20°C)
formPowder/Solid
colorWhite
OdorNone or slight scent of sulfur dioxide
PH5.5-8.5 (50g/l, H2O, 20℃)
Water Solubility250 g/L (20 ºC)
SensitiveMoisture Sensitive
Merck148,626
Stability:Stable, but air sensitive. Incompatible with strong acids, strong oxidizing agents, water, moisture.
Cosmetics Ingredients FunctionsVISCOSITY CONTROLLING
REDUCING
InChI1S/2Na.H2O4S2/c;;1-5(2)6(3)4/h;;(H,1,2)(H,3,4)/q2*+1;/p-2
InChIKeyJVBXVOWTABLYPX-UHFFFAOYSA-L
SMILES[Na+].[Na+].[O-]S(=O)S([O-])=O
LogP-2.756 (est)
CAS DataBase Reference7775-14-6(CAS DataBase Reference)
EPA Substance Registry SystemSodium hydrosulfite (7775-14-6)


Safety Information


Hazard CodesXn
Risk Statements7-22-31
Safety Statements26-28-43-7/8-43E-28A
RIDADRUN 1384 4.2/PG 2
WGK Germany1
F1月10日
Autoignition Temperature>200 °C
TSCATSCA listed
HazardClass4.2
PackingGroupII
HS Code28311010
Storage Class4.2 - Pyrophoric and self-heating hazardous materials
Hazard ClassificationsAcute Tox. 4 Oral
Eye Irrit. 2
Self-heat. 1
Hazardous Substances Data7775-14-6(Hazardous Substances Data)
ToxicityLD50 orally in Rabbit: 2500 mg/kg


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FAQ

Q1: Is Huafeng Chemical a manufacturer or a trader?
A: We are a professional service provider specializing in chemical foreign trade. Rather than being limited to the products of a single factory, we leverage the chemical industry cluster in Shandong Province to integrate production resources from multiple high-quality manufacturers. This allows us to offer a wide range of sourcing options—covering various product categories and origins—instead of simply pushing a single product. Furthermore, our core competitiveness lies in our professional foreign trade services (covering documentation, logistics, and regulatory compliance), ensuring a smooth and worry-free procurement process for you.


Q2: How is the security of my transaction guaranteed when working with Huafeng Chemical?
A: We strictly adhere to international trade rules (Incoterms® 2020) and accept various payment methods, such as Letters of Credit (L/C) and Telegraphic Transfers (T/T). For new clients, we support small-batch trial orders and can clearly define arbitration clauses and applicable laws within the contract. Additionally, we maintain a robust risk management system to help you mitigate common trade risks, such as exchange rate fluctuations, shipping delays, and document discrepancies.


Q3: Do you have experience serving clients in Russian-speaking regions?
A: Yes. We place great importance on the Russian-speaking market; our team includes Russian-speaking business professionals who are well-versed in the import regulations of Russia and the Eurasian Economic Union (EAEU). We understand the importance of EAC certification to clients in these regions and can assist with related compliance inquiries. We have established connections with chemical traders across various CIS countries and have gained valuable experience in specialized packaging and temperature-controlled shipping designed to withstand harsh local winter conditions.


Q4: How do you guarantee product quality?
A: We implement a strict supplier qualification and periodic audit system. A Certificate of Analysis (COA)—issued by the original manufacturer—is provided with every shipment. We also welcome pre-shipment inspections conducted by internationally recognized third-party agencies such as SGS, BV, or ITS. Should the test results fail to meet the standards specified in the contract, you have the right to reject the goods or request a replacement.

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