Sodium
carbonate: one of the most important raw materials of chemical industry, widely
used in glass, chemical industry (caustic soda, sodium nitrate, cleaning agent,
softening hard water), petrochemical, metallurgical industry, also used in
paper making, textile, printing and dyeing, soap, leather, food, medicine,
film, light industry etc.
The
molecular formula of Sodium carbonate is Na2CO3 , the molecular weight is 106,
and the CAS NO is 497-19-8.
We
usually classify sodium carbonate into industrial Sodium carbonate, heavy
Sodium carbonate, edible sodium carbonate
with different standards.
1. Industrial Sodium carbonate GB 210-92III
Total
alkalinity (Na2CO3) ---99.2% MIN
Chloride
(NaCL) -----0.70% MAX
Iron
(Fe) content in -----------0.004% MAX
Water
insoluble matter content of ------------0.04% MAX
Loss
on ignition ------------------0.8% MAX
Total
alkalinity (Na2CO3) --------99.1% MIN
Chloride
--------------------0.70% MAX
Iron
(Fe) content in --------------0.004% MAX
Water
insoluble matter content of -------------0.04% MAX
Loss
on ignition ---------------------0.8% MAX
Bulk
density (g/cm) -------------0.90 MIN
Sieve
(180um) -----------70.0% MIN
3. Edible sodium
carbonate
GB 1886-1992
Total
alkalinity (Na2CO3) -------99.2% MIN
Chloride
(NaCl) ----0.70% MAX
The
iron content of (Fe) -----0.004% MAX
Water
insoluble matter content of ------------0.04% MAX
Heavy
metal (Pb) ---------0.001% MAX
Loss
on ignition------------------0.8% MAX
Arsenic
(As) -----------0.0002% MAX
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