[hek-suh-met-uh-fos-feyt] /ˌhɛk səˌmɛt əˈfɒs feɪt/
See under Calgon.
a brand of sodium phosphate glass (sodium hexametaphosphate) soluble in water: used as a water-softening agent.
trademark a chemical compound, sodium hexametaphosphate, with water-softening properties, used in detergents


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