Industrial  Grade Salt

 
 

Common Salt for Chemical Industries under BIS : IS:797-1982

 
Sr.No Characteristic

Requirement for

    Grade I Grade II
1

Sodium Chloride (as Nacl)Percent by mass, min.

99.5 98.5
2

Matter insoluble in water percent by mass, max.

0.05 0.2
3

Calcium salts (as Ca)percent by mass, max.

0.03 0.2
4

Magnesium salts (as Mg) percent by mass, max.

0.01 0.10
5

Sulphate (as SO4)percent by mass, max.

0.2 0.6
6

Iron compound (as Fe) ppm  max.

10.0 20.0

The moisture content shall not be more than 1% by mass for Grade 1 & 4% by mass for Grade II.