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Stablizer Agent Sodium Sulfite Cas 7757 83 7 food grade for food swelling agent

Stablizer Agent Sodium Sulfite Cas 7757 83 7 food grade for food swelling agent

  • Stablizer Agent Sodium Sulfite Cas 7757 83 7 food grade for food swelling agent
  • Stablizer Agent Sodium Sulfite Cas 7757 83 7 food grade for food swelling agent
Stablizer Agent Sodium Sulfite Cas 7757 83 7 food grade for food swelling agent
Product Details:
Place of Origin: Hunan
Brand Name: Kemsky
Certification: ISO 9001
Model Number: stablizer agent sodium sulfite
Payment & Shipping Terms:
Minimum Order Quantity: 1 metric ton
Price: usd 430 per metric ton
Packaging Details: 25 kgs bag,1000 kgs big 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: Stablizer Agent Sodium Sulfite SSA Other Name: Stablizer Agent Anhydrous Sodium Sulphite
Situation: White Dry Powder Crystalline Usage: Stablizer Agent,preservative
Packing: 25 Kgs Plastic Woven Bag Production Capacity: 3000 Tons Per Month
High Light:

sodium sulfite anhydrous


sodium sulfite oxygen scavenger







(1) Industry Grade : Used in Dyeing and printing Industry ,as dechlorinating agent and bleaching agent, in leather and tanning industry as bleaching agent , developer agent , reductant agent , stabilizer agent , or used in papermaking, electronic and water treatment industry.

(2) Food Grade: In food industry as additive (E223) preservative, antioxidant and antimicrobic for fruits (dried, glazed and candled), vegetables (onions, potatoes, etc.), juices (citrus and grapes) and fish (shrimps and prawns). In silage treatment as antifermentative. In starch and sweeteners production as bacteriostatic.

(3) Photo Grade: In the photographic industry as component of developer bath.

(4) Pharmaceutical Grade : pharmaceutical industry for the production of chloroform, benzene and formaldehyde phenylpropanoid Sulfone


Sodium sulfite should be stored in a dry and cool place.


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1) Parcels can be sent out within 24 hours after payment. Tracking number is available.

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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.

Chemical Properties


melting point 500 °C
density 2.63
refractive index 1,484
storage temp. Store at RT.
solubility H2O: 1 M at 20 °C, clear, colorless
Water Solubility 23 g/100 mL (20 ºC)
Sensitive Hygroscopic
Stability Stable. Incompatible with strong acids. Moisture and air sensitive.

Technical specification


Index name

Analytically pure-AR Chemical pure-CP High purity
Content(Na2SO3) ≥97.0 ≥95.0 ≥96.0
Clarity test Qualified Qualified  
Water insoluble ≤0.005 ≤0.01 ≤0.03
Sulphurous acid( counted by Na2HSO3 ) Qualified Qualified  
Free alkali( counted by Na2CO3 ) ≤0.1 ≤0.3 ≤0.5
Chloride(Cl) ≤0.005 ≤0.02 ≤0.05
Thiosulfuric acid(S2O3) ≤0.01 ≤0.02 ≤0.04
Ferrum(Fe) ≤0.0005 ≤0.002 ≤0.003
Heavy metal(counted by Pb) ≤0.001 ≤0.002 ≤0.003
Arsenic(As) ≤0.0001 ≤0.0005 ≤0.001


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



The role of anhydrous sodium sulfite is extensive, it is in the pharmaceutical industry, paper making, leather tanning and dyeing industries and plant fiber bleaching, food, etc have a very important role. Addition of anhydrous sodium sulfite is also used to film developing, bleaching agents, printing and dyeing industry as a deoxygenation agent.


White crystal or powder; no foul. Soluble in water, very slightly soluble in ethanol, almost insoluble in ether. White hexagonal prismatic crystals, soluble in water (0 ℃ 12.54g/100ml water; 80 ℃ when the 283g/100ml water), in 33.4 ℃ The maximum solubility of about 28% when the aqueous solution is alkaline, PH value is about 9 ~ 9.5 . Slightly soluble in alcohol, insoluble in liquid chlorine, ammonia. Easily oxidized in air sodium, when the temperature is decomposed into sodium sulfide. To strengthen the reducing agent, reacts with sulfur dioxide, sodium bisulfite, reacted with the acid salt.





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