Monosodium dihydrogen phosphate. Monosodium phosphate, anhydrous. Primary sodium phosphate. Phosphoric acid, monosodium salt. UNII-KH7I04HPUU. Sodium biphosphate anhydrous. Monosodium hydrogen phosphate. Sodium dihydrogen phosphate, anhydrous. Sodium phosphate (NaH2PO4) Sodium orthophosphate, primary. Sodium dihydrogen monophosphate. HSDB 738