Amino trimethylene phosphonic acid(ATMP)surpasses other polyphosphate by good chelated, lower limit inhibition and ... liquid Solid content: ≥ 50% Density: ≥ 1.28 Orthophosphoric acid: < 1% Phosphorous acid: ≤5% PH value(1% water solution): 1.5~ 2 ... inhibitor, enhancing suitably when as corrosion inhibitor. Safety protection: Acid liquid, pay attention to protection when operating, flushing with water ...