Specification :

Items Index A Index B Index C Index D
Purity % : 95 min. 77 min. 74 min. 77 min.
NaCl % : 3.0 max. 2.0 max. 4.0 max. 2.0 max.
MgCl2 % :
0.5 max. 0.25 max. 0.5 max. 0.2 max.
PH: 7.0~ 9.0 7.0~ 8.5 7.0~ 9.0 7.0~ 8.5
Alkalinity as Ca( OH) 2 % :
0.2 max. 0.25 max. 0.35 max. 0.2 max.
Sulphate as Ca( SO) 4 % :
0.35 max. 0.3 max. 0.2 max. 0.25 max.
Water insoluable % : 0.2 max. 0.2 max. 0.2 max. 0.2 max.
Iron ppm: 15 max. 15 max. 15 max. 8 max.
Arsenic ppm: 10 max. 10 max. 10 max. 10 max.
Heavy metal as Pb ppm: 15 max. 8 max. 15 max. 5 max.