E173: Aluminium
Main role: metallic surface coloring
Also listed as: aluminum, aluminium powder
What is E173 (Aluminium)?
E173 is metallic aluminium used for a narrow decorative coloring role rather than ordinary flavor or nutrition. Metallic flakes or coatings are applied to a food surface. This use is distinct from aluminium compounds used as processing ingredients and from food-contact packaging.
What does it do in food?
Its main role is metallic surface coloring. Coloring changes appearance. It does not establish the amount of fruit, vegetables, vitamins, or minerals in a serving. Different pigment preparations can have different processing properties and permitted uses.
Food and formulation examples
- Decorative coatings
- Selected confectionery surfaces
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 E173, E 173, or the ingredient name. Related names and label terms include aluminum, aluminium powder. A family code can cover more than one specified form; check the full declaration when the distinction matters.
A metallic decorative finish needs a food-grade product specifically suitable for the permitted use. Craft glitter, metal powders, and packaging materials are not substitutes for edible color.
Is E173 safe?
There is no meaningful personal risk estimate from an E number alone. Food-grade specifications, allowed uses, amount consumed, and individual circumstances all matter. The authorization record below gives the legal scope; it is not a claim that every possible use is appropriate.
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 E173 as Aluminium. 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.