E284: Boric Acid
Main role: restricted preservation
Also listed as: orthoboric acid
What is E284 (Boric Acid)?
Boric acid E284 has a narrowly restricted food-preservative context associated with specified caviar applications. It is not an ordinary kitchen acid or an all-purpose food preservative. Food authorization must be read together with the exact product category and maximum use level.
What does it do in food?
Its main role is restricted preservation. Preservation is one part of a food safety system. Recipe acidity, processing, packaging, and storage also affect how a product keeps. Follow the finished product’s storage instructions even when a preservative is listed.
Food and formulation examples
- Specified caviar preservation
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 E284, E 284, or the ingredient name. Related names and label terms include orthoboric acid. A family code can cover more than one specified form; check the full declaration when the distinction matters.
Household boric acid, pest-control products, and laboratory reagents are not food ingredients. A narrow additive entry never makes those products appropriate to eat.
Is E284 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 E284 as Boric acid. 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.