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SSA Sodium Sulfite Food Grade Anhydrous Na2so3 White Power Cas No 7757 83 7

SSA Sodium Sulfite Food Grade Anhydrous Na2so3 White Power Cas No 7757 83 7

  • SSA Sodium Sulfite Food Grade Anhydrous Na2so3 White Power Cas No 7757 83 7
SSA Sodium Sulfite Food Grade Anhydrous Na2so3 White Power Cas No 7757 83 7
Product Details:
Place of Origin: Hunan
Brand Name: NBSCHEM
Certification: ISO 9001
Model Number: sodium sulfite anhydrous
Payment & Shipping Terms:
Minimum Order Quantity: 1 metric ton
Price: usd 425 per metric ton
Packaging Details: 25 kgs bag,1000 kgs jumbo bag
Delivery Time: 5-8 days
Payment Terms: T/T , L/C
Supply Ability: 3000 tons per month
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Detailed Product Description
Name: Ass Other Name: Anhydrous Sodium Sulphite
Situation: Dry Powder Crystalline Usage: Preservative
Packing: 25 Kgs Plastic Woven Bag/1000 Kgs Jumbo Bag EINECS No: 231-821-4
High Light:

sodium sulfite preservative


sodium sulfite oxygen scavenger


Physical and chemical properties:
White crystalline or powder form; triangular prism crystal shape; alkaline water solution with pH at 9 – 9.5; The highest water solubility is about 28% with temperature at 33.4°C. When exposed to air, it is oxidized to form sodium sulfate. When heated to high temperature, it decomposes to form sodium sulfide; Density: 2.633(15.4°C), Refractive Index: 1.565; Molecular Weight: 126.04.



It is used in dyeing industry as deoxidizer and bleaching agent for a variety of cotton fabric treating and scouring, which can prevent fabrics from local oxidation and deterioration of fibre strength. In photographic industry it is used as a reagent. In organic industry it is used as reducing agent in production of m-phenylenediamine, 25 - bared oxazolone, amino salicylic acid, etc. Textile industry uses it as a stabilizer for synthetic fibre. Other applications include various uses in paper mills, electronic industry, water treatment, etc.



Anhydyous sodium sulphite
English name Anhydyous sodium sulphite
Molecular formula Na2SO3
Technical specifications High purity grade Refined grade Photographic grade Industrial grade Industrial grade Industrial grade
Sodium sulfite Sodium sulfite Sodium sulfite High-class product High-class product First grade product
Na2SO3 ≥ % 98 98 97 98 97 96
Fe ≤ % 0.0005 0.002 0.005 0.003 0.003 0.005
Water insoluble ≤ % 0.005 0.01 0.05 0.02 0.02 0.03
Free alkali ≤ % 0.1 0.3 0.15 0.1 0.1 0.4
Sodium sulfate ≤ % 1.5 1.5 1.5 2.5
Sodium chloride ≤ % 0.005 0.02 0.01 0.1
Heavy metal on Pb≤ % 0.001 0.002 0.002
As ≤ % 0.0001 0.0005
Sodium thiosulfate ≤% 0.01 0.02 0.03
Aqueous solution appearance Qualified Qualified Qualified
Reaction of silver nitrate ammonia solution Qualified


1.Grade Food grade
2.Purity 97%
3.Molecular formula Na2SO3
5. CAS No 7757-83-7
6. HS CODE 28321000
7. EINECS No 231-821-4


Packing : External packing is PP woven bag, Internal packing is PE bag,25 kgs, 50 kgs, 1000 kgs, and 1250 kgs bag packing.

Storage & defence: Stored in cool and dry place, avoid moisture and heat. No breakage, No mixed with oxidant and toxic matter. The storage period is 6 month since the production date. It should be transported by clean car, with covering matter, avoid rain.


We assure of the quality and stable supply, you can use our thiourea first and pay later, for details, please contact with us, thanks.

1. Any inquiries will be replied within 12 hours.
2. Dedication to quality, supply & service.
3. Strictly on selecting raw materials.
4. Reasonable & competitive price, fast lead time.
5.We have strong cooperation with DHL, TNT, UPS, FEDEX, EMS. Or you also can choose your own shipping forwarder.



SSA Sodium Sulfite Food Grade Anhydrous Na2so3 White Power Cas No 7757 83 7 0


Contact Details

Contact Person: Ms.xie

Tel: +8613975090964

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