E511: Magnesium Chloride
Main role: firming and coagulation
Also listed as: magnesium dichloride, MgCl2
What is E511 (Magnesium Chloride)?
Magnesium chloride supplies magnesium ions for technical food functions. It can help coagulate protein and adjust texture in suitable recipes, including some tofu-making systems.
What does it do in food?
Its main role is firming and coagulation. Mineral ingredients can adjust acidity, firm a food, or keep powders flowing. A technical mineral ingredient does not establish a nutritional dose; use the nutrition declaration to assess amounts per serving.
Food and formulation examples
- Tofu preparations
- Firming mixtures
- Food ingredient processing
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 E511, E 511, or the ingredient name. Related names and label terms include magnesium dichloride, MgCl2. A family code can cover more than one specified form; check the full declaration when the distinction matters.
Nigari is a traditional coagulating preparation that may contain several salts; it is not always pure E511. Check the supplier's composition when comparing tofu coagulants.
Is E511 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 E511 as Magnesium chloride. 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.