AVA Chemicals [P] Ltd. Offers Potassium Nitrate. AVA Chemicals [P] Ltd. Is an ISO 9001:2000 certified company which manufactures a wide range of chelating and sequestering agents and fine chemicals. Potassium Nitrate has 2000 PPM Chloride [Cl] content. The assay of Potassium Nitratel is minimum 98 %.