RXSOL CHEMO PHARMA International Navi Mumbai, India

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Powder Chemical

Sodium Hydrosulphite

Sodium hydrosulphite — sodium dithionite, "hydros", Na2S2O4, formula weight 174.1 — is a white crystalline powder and one of the strongest practical reducing agents. RXSOL supplies a 70% active technical grade suited to RO-plant and water-treatment use and an 85% grade for textiles. It reduces vat and sulphur dyes at room temperature, bleaches pulp, paper and foodstuffs, decolourises, chelates and sulphonates in organic reactions, stabilises polyacrylamide in enhanced oil recovery and purifies gases. pH 8–10.5 (100 g/L), specific gravity 1.6. It is moisture- and air-sensitive: keep sealed and dry, away from oxidisers and acids.
Part number
RXSOL-19-1532-020
Brand
RXSOL
Sodium Hydrosulphite

Overview

Sodium Hydrosulfite, Technical Grade, 70% Active Matter suitable for RO Plant. Sodium hydrosulfite, technical grade, 85%

Sodium Hydrosulfite, also known as sodium dithionite or hydros, has a formula of Na2S2O4. It is a white crystalline powder and exists in both the anhydrous and dehydrated forms. Sodium hydrosulfite has a Powerful Reducing capacity and allows vat dyes to be reduced readily at room temperatures. It can also be used as antioxidants in hair treatment processes.

Technical specifications

Assa (unspecified): 70.0%
Formula Na2S2O4
Formula  Weight       174.1
Physical Form Powder/Solid
Colour White
Identification  Pass Test
pH 8 - 10.5  at 100 g/l 20 °C 
Specific Gravity 1.6
Bulk Specific Gravity 0.6
Boiling Point 160°C
Melting Point 52°C

CAUTION: Harmful if swallowed. Give water or milk if swallowed and call a physician. Avoid contact with eyes. Keep out of reach of children. Do not expose to excessive heat.

Applications

Sodium hydrosulfite is stable when dry, but will slowly be oxidized by air. Even with the absence of air, it will be deteriorated and hence it cannot be kept for long and has a comparatively shorter shelf life. When sodium hydrosulfite is wet and in the absence of oxygen, it is unstable and will be decomposed to sodium thiosulfate and sodium bisulfite.

Sodium Hydrosulfite Chemical color stripping agent for INDIGO DYE.
 

APPLICATION :

Strong Reducing Agent
Dyeing, Printing and Stripping of Vat Dyes in Textiles.
Bleaching Sugar, Jaggary, Soap, Oils, Minerals Wood Pulp, Ceramics and Chemicals.
Oxygen scavanger for Synthetic Rubbers.
Discolouration of Effluent.

Dosage and directions

Sodium hydrosulfite is a versatile chemical and is used mainly in textile dyeing, manufacturing of pulp and paper, commercial bleaching agent, bleaching of foodstuffs and as a reducing agent in hair treatment. Sodium hydrosulfite is used as a reducing agent in aqueous solutions, sulfonating agent, chelating agent and decolorizing agent in organic reactions.

Sodium Hydrosulfite finds application in water treatment, gas purification, cleaning, leather, polymers, photography, and many others. It is involved in chemical enhanced oil recovery to stabilize polyacrylamide polymers against radical degradation in the presence of iron.


Sodium Hydrosulfite plays an important role to determine the iron content in soil chemistry.

Characteristics and notes

Storage  :

Moisture and air sensitive. Keep the container tightly closed in a dry and well-ventilated place. Incompatible with strong oxidizing agents, acids and water. It may decompose on exposure to air and moisture

When using this product, the information and advice given in our Safety Data Sheet should be observed. Due attention should also be given to the precautions necessary for handling chemicals. Contact of the products with oxidizing agents (hydrogen peroxide, sodium chlorite, and sodium hypochlorite) must be avoided under all conditions. Hydrosulfite must always be kept at a safe distance away from these agents.

Availability

Sodium Hydrosulfite manufacturer and supplier in Nairobi, Kenya, Uganda Jinja, Africa, UAE Middle East Fujairah, Sharjah, Ajman, Abudhabi, Dubai, Oman - Barka Muscat, India - Mumbai, Kandla Gandhidham, Surat, Kolkata, Visakhapatnam, Chennai, Ennore, Canada

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Frequently asked questions

What is the chemical name of Na2S2O4?

Sodium dithionite; trade names sodium hydrosulphite or hydros.

Why does it have a short shelf life?

It oxidises slowly in air and, when damp without oxygen, decomposes to thiosulphate and bisulphite; buy fresh and store dry.

Hazards?

Harmful if swallowed; can self-heat when wet; keep containers closed and away from heat.