| ITEM | STANDARD |
| Na2H2P2O7 | 95.0% MIN |
| APPEARANCE | WHITE POWDER |
| WATER INSOLUBLE | 1.0% MAX |
| ARSENIC( AS) | 3PPM MAX |
| LOSS ON DRYING | 0.5% MAX |
| CADMIUM (PPM) | 1 MAX |
| LEAD (PPM) | 4 MAX |
| MERCURY (PPM) | 1 MAX |
| HEAVY METAL( PB) | 15PPM MAX |
| FLUORID( PPM) | 10 MAX |
| PH VALUE | 3.5-4.5 |
Disodium pyrophosphate or sodium acid pyrophosphate (SAPP) is an inorganic compound consisting of sodium cations and pyrophosphate anion. It is a white, water-soluble solid that serves as a buffering and chelating agent, with many applications in the food industry.
Sodium acid pyrophosphate (SAPP), or disodium dihydrogen pyrophosphate, its food grade is commonly used with sodium bicarbonate as a leavening agent in bakery products; also, it maintains the color in processed potatoes and prevents struvite crystal in canned seafood.
