Sodium hexametaphosphate

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What Wikipedia says

Sodium hexametaphosphate (SHMP) is a salt of composition Na6[(PO3)6]. Sodium hexametaphosphate of technical grade is typically a mixture of metaphosphates (empirical formula: NaPO3), of which the hexamer is one, and is usually the compound referred to by this name.

Excerpt from the Wikipedia article “Sodium hexametaphosphate”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

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