New phosphonic acids and derivatives thereof

摘要

1,129,687. Sequestering agents. PROCTER & GAMBLE CO. 23 Sept., 1966 [23 Sept., 1965], No. 42557/66. Heading C1C. [Also in Divisions C2 and C5] Triphosphonic acid derivatives of general formula where X is H and Y is OH or X is OH and Y is H and R is H, alkali metal or alkyl, alkenyl, cycloalkyl or cycloalkenyl radicals of from 1 to 6 carbon atoms are used as sequestering agents, particularly in water softening.