|Place of Origin:||Hunan|
|Model Number:||sodium sulfite preservative|
|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|
|Name:||Sodium Sulfite SSA||Other Name:||Anhydrous Sodium Sulphite|
|Shelf Life:||2 Years||Grade:||Food Grade|
SODIUM SULFITE ANHYDROUS
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Specification for Industry Grade and Food Grade :
|Industry Grade||Food Grade|
|Purity ( As Na2SO3)||96.0% min||98.0% min|
|Sodium sulphate ( SO4)||2.0% max||1.0% max|
|Chlorides ( As NaCL)||0.5% max||0.1% max|
|Arsenic ( As )||-||0.0002% max|
|Heavy metals ( As Pb )||-||0.0005% max|
|Iron (Fe)||0.005% max||0.002% max|
|Water insolubles||0.05% max||0.02% max|
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.
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|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|
|melting point||500 °C|
|storage temp.||Store at RT.|
|solubility||H2O: 1 M at 20 °C, clear, colorless|
|Water Solubility||23 g/100 mL (20 ºC)|
|Stability||Stable. Incompatible with strong acids. Moisture and air sensitive.|
|Analytically pure-AR||Chemical pure-CP||High purity|
|Sulphurous acid( counted by Na2HSO3 )||Qualified||Qualified|
|Free alkali( counted by Na2CO3 )||≤0.1||≤0.3||≤0.5|
|Heavy metal(counted by Pb)||≤0.001||≤0.002||≤0.003|
|Anhydyous sodium sulphite|
|English name||Anhydyous sodium sulphite|
|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||—||—||—|
|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.
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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