| 摘要 |
alpha , omega -dihydroxyalkane- alpha , alpha -diphosphonic acids of the formula R-CH(OH)-(CH2)n-C(OH) (PO3H2)2 (I) wherein R represents a phenyl radical, a substituted phenyl radical, or a hydrogen atom, and n is an integer of from 1 to 9, and water-soluble salts thereof, and to compositions containing them. The above diphosphonic acids are produced by reacting omega -amino- alpha -hydroxyalkane- alpha , alpha -diphosphonic acids with nitrous acid or a nitrous acid producing compound.
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