| Customization: | Available |
|---|---|
| CAS No.: | 7758-16-9 |
| Formula: | Na2h2p2o7 |
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Disodium pyrophosphate or Sodium acid pyrophosphate (SAPP) is an inorganic compound with the chemical formula Na2H2P2O7. It consists of sodium cations (Na+) and dihydrogen pyrophosphate anions (H2P2O2−7). It is a white, water-soluble solid that serves as a buffering and chelating agent, with many applications in the food industry. When crystallized from water, it forms a hexahydrate, but it dehydrates above room temperature. Pyrophosphate is a polyvalent anion with a high affinity for polyvalent cations, e.g. Ca2+.
Disodium pyrophosphate is produced by heating sodium dihydrogen phosphate:
2 NaH2PO4 → Na2H2P2O7 + H2O
Sodium Pyrophosphate is a leavening agent, preservative, sequestrant, and buffer which is mildly acidic with a ph of 4.1. It is moderately soluble in water, with a solubility of 15 g in 100 ml at 25°c. It is used in doughnuts and biscuits for its variable gas release rate during the mixing, bench action, and baking process. It is used in baking powder as a leavening agent. It is used in canned fish products to reduce the level of undesired struvite crystals (magnesium ammonium phosphate hexahydrate) by complexing the magnesium. It is used to sequester metals in processed potatoes. It is also termed sapp, sodium acid pyrophosphate, acid sodium pyrophosphate, disodium diphosphate, and disodium dihydrogen pyrophosphate.
| Index name | GB 25567-2010 |
| Assay (as Na2H2P2O7) ≥% | 93.0-100.5 |
| As ≤% | 0.0003 |
| Heavy metals (as Pb) ≤% | 0.001 |
| F≤% | 0.005 |
| PH value(10g/L Solution ) | 4.0±0.5 |
| Pb ≤% | 0.0002 |
| Water insoluble ≤% | 1.0 |
Packaging: Net wt 25KG, PE bag lined composite plastic woven bag.
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A: Established in 2010 and honored every day since. Qingdao Fangjinlong's mission is providing unparalleled quality and service in every aspect of our operations, As a chemical expert and supplier, the company has invested 2 chemical plants and it relies on the research and development of technology of the Environmental Science and Engineering of Ocean university of China . Fangjinlong undertakes and provides support for market-driven research,strives for commercialization of the technologies to benefit the industry and the society at large, as well as to promote the economic growth and sustainability of the earth. Begin your partnership with Fangjinlong , please contact us.
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