Disodium dihydrogen pyrophosphate , AR , 7758-16-9
Synonym(s):
Dentin sialophosphoprotein;Disodium dihydrogen pyrophosphate;DSPP;Sodium diphosphate dibasic
CAS NO.：7758-16-9
Empirical Formula: H2Na2O7P2
Molecular Weight: 221.94
MDL number: MFCD00014246
EINECS: 231-835-0
| Pack Size | Price | Stock | Quantity |
| 500G | RMB71.20 | In Stock |
|
| 2.5KG | RMB239.20 | In Stock |
|
| others | Enquire |
PRODUCT Properties
| Melting point: | decomposes 220℃ [MER06] |
| Density | (hexahydrate) 1.86 |
| vapor pressure | 0Pa at 20℃ |
| storage temp. | -70°C |
| solubility | H2O: 0.1 M at 20 °C, clear, colorless |
| form | white powder |
| color | White to Off-White |
| PH | 3.5-4.5 (20℃, 0.1M in H2O, freshly prepared) |
| Water Solubility | Fully miscible in water. Insoluble in alcohol and ammonia. |
| λmax | λ: 260 nm Amax: 0.11 λ: 280 nm Amax: 0.09 |
| Merck | 13,8643 |
| Stability: | Stable. |
| InChI | InChI=1S/Na.H4O7P2.H/c;1-8(2,3)7-9(4,5)6;/h;(H2,1,2,3)(H2,4,5,6); |
| InChIKey | IQTFITJCETVNCI-UHFFFAOYSA-N |
| SMILES | O(P(O)(O)=O)P(O)(O)=O.[NaH] |
| LogP | -3.420 (est) |
Description and Uses
Sodium acid pyrophosphate (SAPP), or disodium pyrophosphate, is a condensed phosphate formed when sodium orthophosphate is heated to remove the water. It is an inorganic compound consisting of sodium cations and pyrophosphate anion. It is used in food mainly for its two properties: It is a leavening acid that combines with baking soda to release carbon dioxide to improve the texture and volume of baked goods. It is a chelating agent to chelate iron to prevent discolouration in processed potatoes. It is extensively used in food processing, such as in canned seafood, cured meat, and potato products, to adjust the pH, maintain colour, improve the water-holding capacity, and reduce purge during retorting. However, little is known about its toxicity[1].
Sodium Pyrophosphate Dibasic is anhydrous form, pyrophosphate salt used in buffers.
