E943b: Isobutane
Main role: food propellant
Also listed as: 2-methylpropane
What is E943b (Isobutane)?
Isobutane is a branched hydrocarbon gas used as a propellant in specified systems. Its molecular structure differs from normal butane E943a, so the separate code identifies a distinct ingredient.
What does it do in food?
Its main role is food propellant. A carrier helps incorporate another ingredient, while a processing ingredient may support a manufacturing step or coating. The final declaration and exposure depend on the application and the labeling rules in the relevant market.
Food and formulation examples
- Specified food aerosol propellants
- Authorized gas mixtures
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 E943b, E 943b, or the ingredient name. Related names and label terms include 2-methylpropane. A family code can cover more than one specified form; check the full declaration when the distinction matters.
Isobutane and normal butane are different gases within a related propellant group. The appropriate product, equipment, and handling instructions remain essential for the actual application.
Is E943b 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 E943b as Isobutane. 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.