Sodium Acid Pyrophosphate

Specifications :

Properties
Molecular formula	Na₂H₂P₂O₇
Molar mass	221.94 g/mol
Appearance	White odorless powder
Density	2.31 g/cm³
Melting point	600 °C
Solubility in water	11.9 g/100 mL (20 °C)
Refractive index (n_D)	1.4645 (hexahydrate)