- An inorganic chemical, HPO3, utilized as a dehydrating broker plus dental care cements.
- an anhydrous type of phosphoric acid that exists as a polymeric glassy solid, (HPO3)n; used as a drying agent and in dental care concrete
- a glassy solid acid ([HPO3]n) often utilized as a dehydrating broker
Hypernym for "metaphosphoric acid"
- polyphosphoric acid
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