The phosphate ion is a polyatomic ion with the empirical formula PO43- and a molar mass of 94.973 g/mol; it consists of one central phosphorus atom surrounded by four identical oxygen atoms in a tetrahedral arrangement. The phosphate ion carries a negative three formal charge and is the conjugate base of the hydrogenphosphate ion, HPO42-, which is the conjugate base of H2PO4-, the dihydrogen phosphate ion, which in turn is the conjugate base of H3PO4, phosphoric acid.
Ammonium Hydrogen Phosphate
| Inhalation: | Ingestion: |
| Remove to fresh air. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical attention | Induce vomiting immediately as directed by medical personnel. Never give anything by mouth to an unconscious person. Get medical attention. |
Calcium Hydrogen Phosphate
| Fire Extinguishing Media: | Special Information: |
| Use any means suitable for extinguishing surrounding fire. | Use protective clothing and breathing equipment appropriate for the surrounding fire. |
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