1.Specification of Caustic soda flakes:

 

Assay%	48.0	90.0	95.0
Potassium carbonate (K2CO3)	0.5	0.5	0.5
Chloride (Cl)	0.005	0.005	0.005
Iron(Fe)ppm	0.0005	0.0005	0.0005
Sulfate (SO4)	0.005	0.005	0.005
Nitrates (N)	0.0005	0.0005	0.0005
Sodium (Na)	0.8	0.8	0.8
Phosphate (PO4)	0.005	0.005	0.005
Silicate (SiO3)	0.01	0.01	0.01
Aluminum (Al)	0.002	0.002	0.002
Calcium (Ca)	0.005	0.005	0.005
Nickel (Ni)	0.0005	0.0005	0.0005
Heavy metals (as lead )	0.002	0.002	0.002