An adduct of 1-hydroxyethylidene-l, 1-diphosphonic acid and ethylened iamine disuccinic acid or a salt thereof, a method for its preparation, and the use of said adduct

摘要

An adduct of 1-hydroxyethylidene-l, 1-diphosphonic acid and from 0.5 to 10 moles of ethylenediamine disuccinic acid or a salt thereof per mole of 1-hydroxyethylidene-l, 1- diphosphonic acid, wherein said adduct is in the form of a solid.