E450: Diphosphates
Main role: raising, water binding, and emulsifying-salt functions
Also listed as: pyrophosphates, disodium diphosphate, sodium acid pyrophosphate, SAPP
What is E450 (Diphosphates)?
Diphosphates contain two linked phosphate units. E450 covers multiple salts whose functions can include supplying a baking-powder acid, controlling texture, or assisting a processed-cheese emulsion. The specific salt is important to understanding the recipe.
What does it do in food?
Its main role is raising, water binding, and emulsifying-salt functions. Phosphate ingredients have several recipe roles, including acidity control, water management, and texture. Some codes cover multiple related salts, so the full ingredient name is useful when identifying a specific preparation.
Food and formulation examples
- Baking powder
- Specified processed meats
- Processed-cheese formulations
These examples describe formulation roles, not a list of unrestricted legal uses. Availability and permitted applications differ by country and food category.
Label names and ingredient questions
Look for E450, E 450, or the ingredient name. Related names and label terms include pyrophosphates, disodium diphosphate, sodium acid pyrophosphate, SAPP. A family code can cover more than one specified form; check the full declaration when the distinction matters.
SAPP is a familiar baking-label name within this family. An E450 listing does not tell you which salt is present or whether the recipe's purpose is raising, moisture control, or emulsification.
Is E450 safe?
EFSA’s 2019 phosphate assessment excludes moderate or severe kidney dysfunction from its general-population intake limit. EFSA phosphate assessment (2019).
A label identifies the ingredient but usually not its concentration. Calculating daily intake requires the amount in the food and the quantities eaten.
Authorization and conditions of use
The Great Britain food additive register lists E450 as Diphosphates. This is an entry subject to its stated conditions, not unrestricted permission for every food. The record links to the applicable authorization terms. For an EU product, use the European Commission food additive database to check the relevant food category and limits. Other countries may use different names or rules.