Description	The material is in the form of large and small colorless crystals free from clay, grit and other extraneous adulterants
Specification	• Conforming IS 797 – 1982 ( reprint 1998) method. • NaCl : 98.5 % (min, w/w) • Ca+2 : 0.16 % (max, w/w) • Mg+2 : 0.08 % (max, w/w) • SO4-2 : 0.50 % (max, w/w) • Insoluble : 0.10 % (max, w/w) • Iodine : 3.0 ppm