... conforma to the GMP standard.Main purposes: 1.Chemical industry: gy psum,ammonium,Glauber's salt,iron sulphate copper ... ,fat,various resins and other chemical products. 2.Foodstuff industry: salt,monosodium glutam ate,foodstuff additive,chemicalflavouring,starch and ... as weed killer,vermifuge,etc. 4.Mining and metallurgical industry mineral products in copper,zinc and aluminium etc,and metal refined ...