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Na2SO3 97% Purity Sodium Sulfite Anhydrous , Sodium Sulfite Cas No 7757 83 7

Na2SO3 97% Purity Sodium Sulfite Anhydrous , Sodium Sulfite Cas No 7757 83 7

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Brand Name : Kemsky

Model Number : sodium sulfite SSA

Certification : ISO 9001 SGS

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

other name : SSA anhydrous sodium sulphite

situation : dry powder white crystalline

usage : fruit additive,antioxidant,stablizer

purity : Na2SO3, 97%

CAS NO : 7757-83-7

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SODIUM SULPHITE

SODIUM SULFITE ANHYDROUS


Factory offer competitive price sodium sulfite na2so3 sodium sulfite anhydrous

Sodium sulfite (sodium sulphite) is a soluble sodium salt of sulfurous acid (sulfite) with the chemical formula Na2SO3. It is a product of sulfur dioxide scrubbing, a part of the flue-gas desulfurization process. It is also used as a preservative to prevent dried fruit from discoloring, and for preserving meats, and is used in the same way as sodium thiosulfate to convert elemental halogens to their respective hydrohalic acids, in photography and for reducing chlorine levels in pools.


Product Name:Sodium sulfite
Synonyms:Sodium sulfite anhydrous;SODIUM SULFITE, EXSICCATED;SODIUM SULPHITE;anhydroussodiumsulfite;disodiumsulfite;exsiccatedsodiumsulfite;natriisulphis;natriumsulfid
CAS:7757-83-7
MF:Na2O3S
MW:126.04
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

1.GradeFood grade
2.Purity97%
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.


Usage:

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.


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.


Chemical Properties

melting point500 °C
density2.63
refractive index1,484
storage temp.Store at RT.
solubilityH2O: 1 M at 20 °C, clear, colorless
Water Solubility23 g/100 mL (20 ºC)
SensitiveHygroscopic
StabilityStable. Incompatible with strong acids. Moisture and air sensitive.

Technical specification

Specification

Index name

Analytically pure-ARChemical pure-CPHigh purity
Content(Na2SO3)≥97.0≥95.0≥96.0
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
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

Specification:

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 ≤ %0.0050.010.050.020.020.03
Free alkali ≤ %0.10.30.150.10.10.4
Sodium sulfate ≤ %1.51.51.52.5
Sodium chloride ≤ %0.0050.020.010.1
Heavy metal on Pb≤ %0.0010.0020.002
As ≤ %0.00010.0005
Sodium thiosulfate ≤%0.010.020.03
Aqueous solution appearanceQualifiedQualifiedQualified
Reaction of silver nitrate ammonia solutionQualified




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sodium sulfite anhydrous

      

sodium sulfite preservative

      
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