We somehow for a long time with you worked. We now plan purchase Magnesium Sulphate hept in quantity of 100 tons. The technical grade is necessary for us.
I ask you to give cost on FOB (port of shipment), the certificate of quality.
For us it is still necessary Magnesium Sulphate hept with the following parameters: Mass share of magnesium sulphate, not less 99,5 % min Insoluble in water of substances no more of 0,005 % min Iron (Fe) 0,0005 % max Copper (Cu) 0,005 % max