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food additive sodium sulfite fruit preservative SSA white crystalline power 97% HS code:28321000

Categories Sodium Sulfite Food Grade
Brand Name: Kemsky
Model Number: sodium sulfite fruit preservative
Certification: ISO 9001
Place of Origin: Hunan
MOQ: 1 metric ton
Price: usd 430 per metric ton
Payment Terms: T/T , L/C
Supply Ability: 3000 tons per month
Delivery Time: 5-8 days
Packaging Details: 25 kgs bag,1000 kgs big bag
name: sodium sulfite SSA fruit preservative
other name: anhydrous sodium sulphite fruit preservative
grade: food grade for food industry
usage: stablizer ,fruit preservative
packing: 25 kgs plastic woven bag
mocular: Na2SO3
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    food additive sodium sulfite fruit preservative SSA white crystalline power 97% HS code:28321000



    Sodium Sulfite Anhydrous

    is a soluble sodium salt of sulfurous acid (sulphite) with the chemical formula Na2SO3.It is a white crystal powder or granule that tastes salty with sulphur odor.

    1. Chemical Analysis

    Na2SO3%≥ 97.0 %97.37%
    Fe %≤ 0.003%0.003%
    Water insoluble matter≤ 0.02%0.02%
    Na2CO3≤ 0.10%0.10%
    Na2SO4≤ 2.5%2.5%

    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.


    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.


    Basic information

    Product Name:Sodium sulfite
    Synonyms:Sodium sulfite anhydrous;SODIUM SULFITE, EXSICCATED;SODIUM SULPHITE;anhydroussodiumsulfite;disodiumsulfite;exsiccatedsodiumsulfite;natriisulphis;natriumsulfid
    Product Categories:Inorganic Chemicals;Inorganics;Water Ttreatment Chemicals;Analytical Reagents for General Use;Disulfide Bridge Cleavage Reagents;Denaturation;Synthetic Reagents;ACS GradeBiochemicals and Reagents;Synthetic Reagents;inorganic compound;Paper, glass, printing and dyeing
    Mol File:7757-83-7.mol

    Chemical Properties

    melting point500 °C
    refractive index1,484
    storage temp.Store at RT.
    solubilityH2O: 1 M at 20 °C, clear, colorless
    Water Solubility23 g/100 mL (20 ºC)
    StabilityStable. Incompatible with strong acids. Moisture and air sensitive.

    Technical specification


    Index name

    Analytically pure-ARChemical pure-CPHigh purity
    Clarity testQualifiedQualified
    Water insoluble≤0.005≤0.01≤0.03
    Sulphurous acid( counted by Na2HSO3 )QualifiedQualified
    Free alkali( counted by Na2CO3 )≤0.1≤0.3≤0.5
    Thiosulfuric acid(S2O3)≤0.01≤0.02≤0.04
    Heavy metal(counted by Pb)≤0.001≤0.002≤0.003


    1, High quality with competitive price:

    We are manufacturer and can provide high quality products with factory price.

    2, Fast and safe delivery

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

    2) Secure and discreet shipment. You have various choices of transportation methods.

    3, We have clients throughout the world.

    1) Professional service and rich experience make customers feel at ease, adequate stock and fast delivery meet your desire.

    2) Market feedback and goods feedback are appreciated, meeting customers's requirement is our responsibility.

    3) High quality, competitive price, fast delivery, first-class service gain the trust and praise from the customers.


    Anhydyous sodium sulphite
    English nameAnhydyous sodium sulphite
    Molecular formulaNa2SO3
    Technical specificationsHigh purity gradeRefined gradePhotographic gradeIndustrial gradeIndustrial gradeIndustrial grade
    Sodium sulfiteSodium sulfiteSodium sulfiteHigh-class productHigh-class productFirst grade product
    Na2SO3 ≥ %989897989796
    Fe ≤ %0.00050.0020.0050.0030.0030.005
    Water insoluble ≤ %0.0050.
    Free alkali ≤ %
    Sodium sulfate ≤ %
    Sodium chloride ≤ %0.0050.020.010.1
    Heavy metal on Pb≤ %0.0010.0020.002
    As ≤ %0.00010.0005
    Sodium thiosulfate ≤%
    Aqueous solution appearanceQualifiedQualifiedQualified
    Reaction of silver nitrate ammonia solutionQualified

    1.GradeFood grade
    3.Molecular formulaNa2SO3
    5. CAS No7757-83-7
    6. HS CODE28321000
    7. EINECS No231-821-4

    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.


    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.

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