Dear Sir/Madam, We are very interested in supply of following reagents: 15 t. (every 3 months) of nigrosine alcohol soluble (technical); 1.5 t. (single supply) of nigrosine water soluble (technical); 20 t. (1 container) (single supply) of nonyl alcohol (technical) and 25 t. (in 1 container) (every 3 months) of potassium ferrocyanide (technical). Could you give us prices as FOB and CIF S.-Petersburg (Russia) on listed reagents interesting us?