
| a colorless, odorless, crystalline, water-soluble solid, NaNH4HPO4·4H2O, originally obtained from human urine: used as a blowpipe flux in testing metallic oxides. |
| microcosmic salt n. A white crystalline salt of phosphorus, HNaNH4PO4·4H2O, used in blowpipe analysis of minerals to test for the presence of certain metals. |