... with a complete phosphorous chemical industrial, from yellow phosphorus. 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid (HEDP)CAS No.: 2809-21-4Molecular Formula ... (as Cl-)%0.3 max0.1 maxpH (1% solution)2 max2 maxDensity (20°C)g/cm31.40 min-Fe ion ppm10 max20 maxCa ... , oil field and low-pressure boilers in fields such as electric power, chemical industry, metallurgy, fertilizer, etc.. In light woven ...