| a colorless, odorless, crystalline, water-soluble solid, NaNH4HPO4·4H2O, originally obtained from human urine: used as a blowpipe flux in testing metallic oxides. |
| sodium ammonium phosphate n. A colorless, odorless crystalline compound, NaNH4HPO4·4H2O, used in the blowpipe analysis of minerals. |