Dear Sir We need to buy the following , all agriculture grade. Pls. send C & F Chittagong price. Pls. send details. 1. Magnesium Sulphate a. Total Magnesium percent by weight Minimum 9.5 % b. Sulphur (As SO4) Percent by weight minimum 12.5 % c. Physical condition ----- White Crystalline Powder 2. Zinc Sulphate (Heptahydrate) a. Total zinc content 21 % b. Water soluble zinc 95 % c. Sulphur ( as S04-s ) 10.5 % d. Magnesium (Mg) 1 % max e. Copper (Cu) 0.1 f. pH not less than 4 g. matter insoluble in water : 1 % h. Moisture content (free water) 3. Chelated Zinc .a. Zinc Content Minimum 10 % b. Moisture 7 % c. Physical Condition : Pale Yellow amorphous d. Ph not less than 5 % 4. Zinc Sulphate ( Monohydrate granular grade) a. Total zinc content 36 % b. Water soluble zinc 95 % c. Sulphur ( as S04-s ) 17.5 % d. Magnesium (Mg) 1 % max e. Copper (Cu) 0.1 f. pH not less than 4 g. matter insoluble in water : 1 % h. Moisture content (free water) Regards Ahmed