Specification
Characteristic |
Requirement for |
|
Grade I |
Grade II |
|
Sodium Chloride (as Nacl)Percent by mass, min. |
99.5 |
98.5 |
Matter insoluble in water percent by mass, max. |
0.05 |
0.2 |
Calcium salts (as Ca) percent by mass, max. |
0.03 |
0.2 |
Magnesium salts (as Mg) percent by mass, max. |
0.01 |
0.10 |
Sulphate (as SO4) percent by mass, max. |
0.2 |
0.6 |
Iron compound (as Fe) ppm max. |
10.0 |
20.0 |
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