Home Categories Inorganic chemistry Disodium dihydrogen pyrophosphate
A3628812

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
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Update time: 2022-07-08

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)
CAS DataBase Reference 7758-16-9(CAS DataBase Reference)
EPA Substance Registry System Disodium diphosphate (7758-16-9)

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.

Safety

Symbol(GHS) 
GHS07
Signal word  Warning
Hazard statements  H319
Precautionary statements  P305+P351+P338
Hazard Codes  Xi
Risk Statements  36
Safety Statements  24/25-26
WGK Germany  2
RTECS  UX6475000
TSCA  Yes
Hazardous Substances Data 7758-16-9(Hazardous Substances Data)

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