NA2CO3:
 99.2% MIN.         
 
 
CHLORIDE CONTENT:
 0.7% MAX.
 
 
IRON CONTENT:
 0.0035% MAX.
 
 
WATER INSOLUBLE MATTER:
 0.03% MAX.
 
 
bulk density( g/ml):
 0.90 MIN.
 
 
FINENESS(180μm residue on sieve):
 70.0% MIN.