| LAD Company S.R.O. As export distributor of several Russian producers we can offer you now Potassium Sulphate (SOP powder and granular, fertilizer grade), Potassium Carbonate, Sodium Tripolyphosphate (STPP) of Russian origin. Our STPP is certified by P&G, Henkel and Re... Member since 3 August, 2010, Russia - Leningradskaya |