Nomenclature
CAS number: 50813-16-6
Graham's salt; “sodium hexametaphosphate”; glassy sodium metaphosphate; Hy-Phos.
Description and references
(NaPO3)x. A mixture
of polymeric metaphosphates; not a hexamer. Prepd by rapidly chilling
molten sodium metaphosphate: Bell, Inorg.
Synth. 3, 103 (1950). Reviews: see Sodium Metaphosphate.
Properties
Clear, hygroscopic glass. mp 628°. Sol in water, but dissolves slowly.
Depolymerizes in aqueous soln to form sodium trimetaphosphate and
sodium orthophosphates.Derivative
Sodium hexametaphosphate detergents.
Nomenclature
Calgon; Giltex; Quadrafos; Hagan phosphate; Micromet. Properties
Mixtures contg Graham's salt as the principal
agent. Supplied in the form of a powder, flakes, and as small, broken,
glass-like particles. Sol in water (pH adjusted to 8-8.6). Insol
in organic solvents. Possess dispersing and deflocculating properties,
coagulate albumins, and inhibit the crystn of slightly sol compds
such as calcium carbonate and calcium sulfate.Use
Water softeners and detergents. For leather tanning,
dyeing, laundry work, textile processing; for the “threshold treatment”
of softening industrial water supplies.