Aluminum Hypophosphite
Title: Aluminum Hypophosphite
CAS Registry Number: 7784-22-7
Molecular Formula: AlH6O6P3
Molecular Weight: 221.95
Percent Composition: Al 12.16%, H 2.72%, O 43.25%, P 41.87%
Line Formula: Al(PO2H2)3
Literature References: Prepd by heating Al(OH)3 or a solution of an aluminum salt with hypophosphorous acid or sodium hypophosphite: Everest, J. Chem. Soc. 1952, 2945.
Properties: Cryst powder; decomposes without melting at ~220° with evolution of phosphine. Practically insol in water. Sol in warm NaOH soln, dilute sulfuric and dilute or concd hydrochloric acid.
Use: In acrylonitrile polymer fiber finishes.

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