| 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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Q1. How can we guarantee quality?
A: Always a pre-production sample before mass production;
Always final Inspection before shipment;
Q2: Can you give me a discount price?
A: Surely,It depend on your quantity.
Q3: How can i get a sample?
A: Free samples is available,but freight charges will be at your account and the charges will be return to you or deduct from your order in the future.
Q4: How to confirm the Product Quality before placing orders?
A: You can get free samples for some products, you only need to pay the shipping cost or arrange a carrier to us and take the samples. You can send us your product specifications and requests, we will manufacture the products according to your requests.
Q5:How do you treat quality complaint?
A: First of all, our quality control will reduce the quality problem to near zero. We can arrange the quality test by third-party testing agency as you needed before shipping. If there is still a real quality problem caused by us, we will do our best to reduce your loss.
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