Chemical · Product Detail
Sodium Dithionite
Reducing agent for mechanical-pulp brightening, textile vat dyeing and reduction cleaning.
Request a Quote
Sodium Dithionite at a Glance
ZXCHEM is a sodium dithionite supplier and exporter in China, CAS 7775-14-6. It is a reducing agent for mechanical-pulp brightening, textile vat dyeing and reduction cleaning. It is supplied as white free-flowing crystalline powder; available grade: 85% / 88% / 90%.
Request a free sample for testing.
Standard lead time is approximately 14 days from order confirmation.
Sodium Dithionite Specifications
The newer supplied four-grade table is used. Older metabisulfite/carbonate formulation values are not merged into this grade table. A food-grade designation alone is not a market or end-use authorization.
Commercial Information
Product Series
Industrial grade 90
Dithionite ≥90%; common trace-metal and insoluble limits apply.
Industrial grade 88
Dithionite ≥88%; common trace-metal and insoluble limits apply.
Industrial grade 85
Dithionite ≥85%; common trace-metal and insoluble limits apply.
Food-additive-designated grade 85
Dithionite ≥85%. Use as a food additive requires market authorization and the applicable food specification.
Storage & Shipping
Storage Conditions
Keep cool and dry in tightly closed original packaging. Protect from sunlight and moisture; separate from acids and oxidizers. Maintain suitable air gaps between stacks.
Shelf life
12 months under the specified original-packaging storage conditions.
Packaging
15 kg, 25 kg, 50 kg or 100 kg iron drums with double inner polyethylene bags; use authorized dangerous-goods packaging.
Handling & Protection
Review the grade SDS before transfer, sampling or processing. Use suitable ventilation, protective equipment and compatible handling equipment.
What Is Sodium Dithionite?
Sodium dithionite (sodium hydrosulfite), CAS 7775-14-6, is a reducing agent used for vat and indigo dyeing, bleaching of mechanical pulp, kaolin clay bleaching and chemical reduction.
Grades with minimum assays of 85%, 88% and 90% are available. Food-additive use needs a grade approved in the destination market.
It ships as UN 1384, Class 4.2, packing group II. Water, acids and heat cause decomposition and can lead to self-heating and release of sulfur dioxide, so keep it dry, sealed and cool.
As a sodium hydrosulfite supplier and exporter in China, ZXCHEM packs it in 15 kg, 25 kg, 50 kg or 100 kg iron drums with double PE liners, in approved dangerous-goods packaging.
See all papermaking additives in our catalog.
Sodium Dithionite Applications
Textile dyeing
Reducing agent for vat and indigo dyeing and reductive clearing.
Pulp and clay bleaching
Reductive bleaching of mechanical pulp and kaolin.
Chemical reduction
Reducing agent in chemical processes.
Why Source Sodium Dithionite from ZXCHEM
Combined chemical orders
Source several chemical raw materials through one ZXCHEM contact. We coordinate product selection, quotations and suitable consolidated shipments so you can plan the order with one team.
Dedicated R&D Laboratory
Discuss specifications, sample results and application questions with our technical team. Our dedicated R&D laboratory supports product testing and helps clarify material selection.
Experienced Chemical Logistics
ZXCHEM has more than 30 years of experience in dangerous-goods transportation. We coordinate suitable shipments through logistics companies in which we hold equity interests in Qingdao, Shanghai, Guangzhou and Tianjin.
Dedicated Purchasing Support
Your account manager follows the order from quotation and contract signing through shipment and after-sales support. One contact coordinates technical documents, commercial details and delivery updates.
Sodium Dithionite FAQ
What grade of Sodium Dithionite is listed?
The listed grade is 85% / 88% / 90% grades, supplied as white free-flowing crystalline powder. The grade comparison and TDS distinguish the separate limits; specify the required grade on your inquiry.
Can I request an evaluation sample of Sodium Dithionite?
Yes. Send the application, target grade and test quantity, and we confirm the sample and technical documents. Read the SDS before handling or laboratory evaluation.
How is Sodium Dithionite packed and stored?
15 kg, 25 kg, 50 kg or 100 kg iron drums with double inner polyethylene bags; use authorized dangerous-goods packaging. Keep cool and dry in tightly closed original packaging. Protect from sunlight and moisture; separate from acids and oxidizers. Maintain suitable air gaps between stacks. Confirm the packing selected for the quotation and destination before placing the order.
Which documents are available for Sodium Dithionite?
Download the TDS for the listed technical grade and the reference SDS for safety and transport information. Each order comes with a batch COA; include any market or end-use requirements in your inquiry.
Related Products
Request a Quote for Sodium Dithionite
Tell us the required grade, quantity, destination port and documents. We reply within one business day.
We use your details to respond to this enquiry. You can also contact sales@zxchem.com.cn. Read our Privacy Policy.