sodium triphosphate

sodium tripolyphosphate

noun Chemistry.
a white powder, Na 5 P 3 O 1 0 , used as a water softener, sequestering agent, and food additive.
Also called sodium triphosphate.

1940–45; tri- + poly- + phosphate Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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sodium tripolyphosphate

a sodium salt of triphosphoric acid used as a builder in soaps and detergents 
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