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Kurrol's salt

noun
Kur·​rol's salt | \ˈkər|əlz-, ˈku̇r|\

Definition of Kurrol's salt 

: an insoluble sodium metaphosphate or potassium metaphosphate especially : a fibrous crystalline sodium metaphosphate NaPO3 IV formed by seeding a melt at 550° C

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History and Etymology for Kurrol's salt

perhaps from the name Kurrol

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