Sodium Acid Pyrophosphate – SAPP
Sodium acid pyrophosphate (SAPP) is an inorganic phosphate additive supplied as a white crystalline powder, practically tasteless, used primarily as a chemical leavening agent and acidity regulator. It acts in combination with sodium bicarbonate, controlling the rate of CO₂ release in bakery products. SAPP is classified as a raising agent and acidity regulator/emulsifier (E450i).
Source
SAPP is produced by:
- reacting sodium phosphate with phosphoric acid,
- controlled heating to form the pyrophosphate bond,
- cooling, crystallization, and milling.
The result is a highly purified, standardized product suitable for food applications.
Variations
Commercial SAPP types differ in:
- rate of reaction in dough (fast, medium, slow),
- particle size and solubility,
- available base content (expressed as neutralizing value).
Different types are selected depending on product (biscuits, cookies, instant pancakes, bakery mixes) and desired leavening profile.
Applications In The Food Industry
Bakery Industry
SAPP is key in:
- baking powders and chemical leavening systems,
- cake, pancake, waffle, and muffin mixes,
- cookies and biscuits where controlled volume and porosity are required.
In combination with sodium bicarbonate, it ensures uniform leavening, pH control, and fine crumb structure.
Frozen Foods Industry
In frozen products, SAPP is used for:
- doughs and semi-finished bakery products for freezing,
- coated products where stable structure and crispness depend on proper leavening,
- ready-made pancakes, waffles, and similar items for regeneration.
It helps preserve volume and texture after freezing and reheating/baking.
Savory Foods Industry
In savory applications, SAPP:
- regulates pH and contributes to texture in special products (e.g. potato or cereal-based dough mixes),
- participates in controlled CO₂ release in some instant savory applications (savory pancakes, quick breads).
It is used wherever reliable chemical leavening is required.
Benefits Of Use
- reliable chemical leavening agent with controlled reaction rate
- stable, easy-to-dose powder for bakery premixes
- contributes to fine crumb structure and uniform volume
- compatible with various flours and ingredients
- applicable in frozen and ready-to-bake concepts
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