Details: ferric alum grade iv – type - ias per specification of i.s. code no. 299/1989 (amended upto date) isi marks. specification :- required grade ia) water soluble aluminum compounds. (as al2 o3) % by mini – 16-17%b) p.h. of 5% aqueous solution min – 2.70%c) basicity al2 o3 as mass max – 0.5%d) lead (as pb) – 30 ppme) arsenic (as2 o3) - 06 ppmf) acidity as free sulphuric acid by mass min– 40%description :- aluminum sulphate octadeca hydrated (al2 o3 18 so4)2 and contain 5-10% less. water than the theoretical value.colour :- should be in the form of slabes grean in colour & non toxic for water purification
Sector: Urban Authority