SODIUM SULFITE ANHYDROUS
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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.
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.
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.
|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.