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Sodium Hydrosulphite

Available Packing Sizes: 

"Hydro" is a universal reducing agent that is used for indigo dyeing, Available with us in 25, 50 Kg packing.

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.

Product Application: 

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.

Product Dose: 

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.

Product Note: 

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.

Product Technical Specification: 


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.

PHYSICAL FORM : White to grayish-white crystalline free flowing powder with pungent odour.
PROCESS : Manufactured by Zinc Process.
Molecular wt. : 174.
Bulk Density : 1.1 to 1.4
Melting Point : 55oC
Solubility : Soluble in water, insoluble in alcohol and methanol.
Odour : Pungent

Sodium Hydrosulfite Chemical color stripping agent for INDIGO DYE.


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.

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

Free Delivery / Supply Locations : 
Oman, Bahrain, Abu Dhabi, Ajman, Al Ain, Dubai, Ras Al-Khaimah, Ras al Khaimah, Fujairah, Sharjah, Umm Al Quwain, Fujairah, Ruwais, Mina (Port) Zayed, Khalifa Port, Kizad, Port Rashid, Jebel Ali Port, DP WORLD, Jebel Ali Free Zone, Khor Fakkan Container Terminal, Port Rashid, Jebel Ali Port, Mina Kalid Port, Khor Fhakan Port ( Khawr Fakkan, Khawr al-Fakkan ), Sharjah Creek, Ajman, Port of Hamriyah, Mina Zayed Port, Mussafah port, Khalifa Port, Umm al-Nar Port, Um Al Quwain Port, Saqr Port, Port of Fujairah, Dibba Port, Jebel Dhanna, Mina Al Hamriya, Mina Rashid, All United Arab Emirates

About Us

We are one of largest marine chemical manufacturing company in Asia. Our specialization in marine, oil field, shipping industry. Since 1995 our group team continiously developing our product to achieve best in quality and services. Specially in shipping industries we make our position on TOP among all supplier. All shipchandler and shipping company of UAE - Middle East are well known to us and DUBI CHEM Marine International have more then 1800 global regular client to achieve our monthly target more then 360 MT .   DUBI Chem Marine International have very strong distribution network as well in INDIA also to complete supply directly on ship vessel - (Kandla,Mundra,Sikka) , (Mumbai,JNPT,Goa,Manglore) , (Vizag-Visakhapatnam,Gangavaram) , (Chennai,Ennore,Kochin) , ( Kolkata, Haldia, Paradip ) etc... For INDIA supply directly mail us on or feel free to call us 0091-9322594669 ...

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Telephone No.- 00971 9 2242524 / 00971 9 22 35488


Address : الحيل Plot no. 37A, block -L, Next to GULF Ready Mix Al Hayl Industrial Area - Fujairah - United Arab Emirates