| 摘要 |
Compounds having the formula I: (see fig.I) wherein M1, M2, M3, independently, are hydrogen, C1-C4alkyl, phenyl, a monovalent or an equivalent of a polyvalent metal atom, ammonium or a substituted ammonium ion; R1 is C1-C4alkyl substituted by one or more hydroxy or carboxyl groups; and p is an integer. The new compounds are useful in the treatment of aqueous systems, in particular to inhibit scale deposition from aqueous systems.
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