Disodium Dihydrogen Hypophosphate
Title: Disodium Dihydrogen Hypophosphate
CAS Registry Number: 7782-95-8
Additional Names: Disodium dihydrogen subphosphate; sodium dihydrogen hypophosphate; sodium acid hypophosphate
Molecular Formula: H2Na2O6P2
Molecular Weight: 205.94
Percent Composition: H 0.98%, Na 22.33%, O 46.61%, P 30.08%
Line Formula: Na2H2P2O6
Literature References: Prepd by the oxidation of red phosphorus with sodium chlorite in water: Leininger, Chulski, Inorg. Synth. 4, 68 (1953).
Derivative Type: Hexahydrate
Properties: Monoclinic plates from water, d 1.849. Becomes anhydr at 110°. mp 250°. Soly of the hexahydrate in water at 25°: 2.0 g/100 ml; at 100°: 25.0 g/100 ml. Insol in alc. Aq solns have an acid reaction.
Melting point: mp 250°
Density: d 1.849
Status: This monograph has been retired and is no longer subject to revision or update.

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