Disodium pyrophosphate

sodium acid pyrophosphateDisodium diphosphateSAPP
Disodium pyrophosphate or sodium acid pyrophosphate (SAPP) is an inorganic compound consisting of sodium cations and pyrophosphate anion.wikipedia
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Pyrophosphate

diphosphatePPiPP i
Disodium pyrophosphate or sodium acid pyrophosphate (SAPP) is an inorganic compound consisting of sodium cations and pyrophosphate anion. Disodium pyrophosphate and other sodium and potassium polyphosphates are widely used in food processing; in the E number scheme, they are collectively designated as E450, with the disodium form designated as E450(a).
Important salts include disodium pyrophosphate and tetrasodium pyrophosphate.

Baking powder

baking-powder
Disodium pyrophosphate is a popular leavening agent found in baking powders.
Alternately, a commercial baking powder might use sodium acid pyrophosphate as one of the two acidic components instead of sodium aluminium sulfate.

Leavening agent

leavenedunleavenedleavening
Disodium pyrophosphate is a popular leavening agent found in baking powders.
Other leavening agents developed include sodium aluminium sulfate (NaAl(SO 4 ) 2 ·12H 2 O), disodium pyrophosphate (Na 2 H 2 P 2 O 7 ), and sodium aluminium phosphates (NaH 14 Al 3 (PO 4 ) 8 ·4H 2 O and Na 3 H 15 Al 2 (PO 4 ) 8 ).

E number

E-numberEE numbers
Disodium pyrophosphate and other sodium and potassium polyphosphates are widely used in food processing; in the E number scheme, they are collectively designated as E450, with the disodium form designated as E450(a).

Monosodium phosphate

Monobasic sodium phosphatesodium dihydrogen phosphateMSP
Disodium pyrophosphate is produced by heating sodium dihydrogen phosphate:
Heating this salt above 169 °C gives the corresponding sodium acid pyrophosphate:

Inorganic compound

inorganicinorganic compoundsinorganic chemical
Disodium pyrophosphate or sodium acid pyrophosphate (SAPP) is an inorganic compound consisting of sodium cations and pyrophosphate anion.

Buffering agent

bufferbufferingbuffers
It is a white, water-soluble solid that serves as a buffering and chelating agent, with many applications in the food industry.

Chelation

chelatechelatingchelating agent
It is a white, water-soluble solid that serves as a buffering and chelating agent, with many applications in the food industry.

Valence (chemistry)

divalentvalencevalency
Pyrophosphate is a polyvalent anion with a high affinity for polyvalent cations, e.g. Ca 2+.

Generally recognized as safe

GRASgenerally recognized as safe (GRAS)safe
In the United States, it is classified as generally recognized as safe (GRAS) for food use.

Canning

cannerycannedcanned food
In canned seafood, it is used to maintain color and reduce purge during retorting.

Curing (food preservation)

curedcuringcured meat
In cured meats, it speeds the conversion of sodium nitrite to nitrite (NO 2 − ) by forming the nitrous acid (HONO) intermediate, and can improve water-holding capacity.

Sodium nitrite

NaNO 2 E250sodium
In cured meats, it speeds the conversion of sodium nitrite to nitrite (NO 2 − ) by forming the nitrous acid (HONO) intermediate, and can improve water-holding capacity.

Nitrite

nitritesNO 2 − nitrite ion
In cured meats, it speeds the conversion of sodium nitrite to nitrite (NO 2 − ) by forming the nitrous acid (HONO) intermediate, and can improve water-holding capacity.

Nitrous acid

HONOHNO 2 nitrous
In cured meats, it speeds the conversion of sodium nitrite to nitrite (NO 2 − ) by forming the nitrous acid (HONO) intermediate, and can improve water-holding capacity.

Hash browns

hash brownhash brown potatoeshash
Disodium pyrophosphate is also found in frozen hash browns and other potato products, where it is used to keep the color of the potatoes from darkening.

Potato

potatoesSolanum tuberosumIrish potato
Disodium pyrophosphate is also found in frozen hash browns and other potato products, where it is used to keep the color of the potatoes from darkening.

Food browning

browningenzymatic browningenzymatic oxidation
Disodium pyrophosphate is also found in frozen hash browns and other potato products, where it is used to keep the color of the potatoes from darkening.

Leather

leather goodsdeerskinpigskin
In leather treatment, it can be used to remove iron stains on hides during processing.

Iron

FeFe 2+ Fe(III)
In leather treatment, it can be used to remove iron stains on hides during processing.

Hydrogen peroxide

H 2 O 2 H2O2HO
It can stabilize hydrogen peroxide solutions against reduction.

Sulfamic acid

sulfamatesulphamatesulphamic acid
It can be used with sulfamic acid in some dairy applications for cleaning, especially to remove soapstone.

Dandruff

scurfanti-dandruffantidandruff
When added to scalding water, it facilitates removal of hair and scurf in hog slaughter and feathers and scurf in poultry slaughter.

Dispersant

dispersantsdispersing agentbio-dispersant
In petroleum production, it can be used as a dispersant in oil well drilling muds.

Cat

domestic catcatsFelis catus
It is used in cat foods as a palatability additive.