SODIUM SULFITE ANHYDROUS
Sodium Sulfite Anhydrous / Sodium Sulphite
Sodium sulfite Application:
1. In the field of water treatment
as the deoxidant of boiler water and oilfield flooding;
as antichlor for municipal and industrial water;
as the raw material for the production of sodium thiosulfate;
as the stabilizer of viscose acetal fibre;
as the bactericide of beer bottle.
2. In food industry: as bleaching agent, preservative, bulking
agent, antioxidant and for the medicine synthesis
3. As analytical reagent, light dependent resistor materials and
base solution of polarographic analysis
4. As antioxygen of cosmetics, mainly for hair dye cosmetics
5. As reducing agent of spice, dye and so on
6. In textile industry: as bleacher and deoxidier for fabric
7. In paper industry: as lignin removal 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.
|5. CAS No||7757-83-7|
|6. HS CODE||28321000|
|7. EINECS No||231-821-4|
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.
|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||—||—||—|
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.