... a complete phosphorous chemical industrial, from yellow phosphorus. 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP)CAS No.: 2809-21-4Molecular ... good chemical stability under high pH value, hard to be hydrolyzed, and hard to be decomposed under ordinary light and ... 0-62.089.0 minPhosphorous acid (as PO33-)%1.0 max0.5 maxPhosphoric acid (asPO43- )%0.5 max0.5 maxChloride (as Cl-)%0.3 max0.1 maxpH (1 ...