Which substance is called "calgon"on commercial base?
(A) Sodium pyrometaphosphate
(B) Sodium metaphosphate
(C) Sodium hexametaphosphate
(D) Sodium polyphosphate
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The original product consisted of powdered sodium hexametaphosphate (amorphous sodium polyphosphate), which in water would complex with ambient calcium ion and certain other cations, preventing formation of unwanted salts and interference by those cations with the actions of soap or other detergents. Its name was a portmanteau derived from the phrase "calcium gone".
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