We are a netherlands based trading company. We are looking for copper sulphate technical and feed grade producers only. Basic specs reqd: % purity - 99 % min Appearance - bluish fine crystals 0.1- 0.5 mm grain size, free flowing with anti caking agent max 1.5 % for feed grade. Copper content - 25.2 % min. Price - please quote cfr riga and antwerp basis per mt. Delivery - prompt Detail product specs required. Sample reqd if price workable