Categories | Sodium Sulfite Food Grade |
---|---|
Brand Name: | Kemsky |
Model Number: | sodium sulfite |
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 |
other name: | anhydrous sodium sulphite |
color: | white |
situation: | crystalline powder |
usage: | food industry |
packing: | External packing is PP woven bag, Internal packing is PE bag,25 kgs, 50 kgs, 1000 kgs, |
Company Info. |
NINGBO SOURCECHEM CO.,LTD |
Verified Supplier |
View Contact Details |
Product List |
SODIUM SULFITE ANHYDROUS
Notice:
Store it in aeration and shady place . Not put it together with
strong acids, oxidants. Avoid the
wrappage being perforated and prevent from water and moisture when
conveyed. Exposure to moisture
will make it to be oxidized easily to release SO2. Do not store it
for long time.
Specification:
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 |
4. CAS No | 7757-83-7 |
5. HS CODE | 28321000 |
6. EINECS No | 231-821-4 |
Nature:
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.
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.
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