E943B – Isobutane

Isobutane, designated as E943b, is a colorless, odorless, and highly flammable hydrocarbon gas. In the food industry, it is primarily used as a propellant in aerosol spray cans, notably for vegetable oil-based cooking sprays and water-based emulsion cooking sprays. 

Danger Level: 1 – Mostly Safe

Purpose in Products

  • Propellant in Cooking Sprays: Isobutane is utilized to expel the contents of aerosol cans, such as cooking oils, ensuring a fine mist application that prevents food from sticking to cookware. 

Health Considerations

When used appropriately as a propellant in food products, isobutane is considered safe and does not pose health risks to consumers. It does not react with food components and evaporates upon application, leaving no residue. 

Impact on Children

There is no specific evidence to suggest that isobutane has adverse effects on children when used as a propellant in food products. Its inert nature ensures it does not interact with food or pose health risks to consumers of any age.

Impact on Taste

Isobutane is tasteless and does not alter the flavor, aroma, or texture of food products. Its use is limited to the expulsion of the product from aerosol containers.

Compatibility with Other Additives

As a propellant, isobutane is compatible with various substances used in aerosol formulations, including emulsifiers and stabilizers present in cooking sprays.

Natural Occurrence

Isobutane is a naturally occurring hydrocarbon found in natural gas and crude oil. For industrial purposes, it is separated from natural gas or refined from petroleum. 

Alternatives and Substitutes

Other gases used as propellants in the food industry include:

  • Butane (E943a): An isomer of isobutane, also used as a propellant in aerosol sprays.
  • Propane (E944): Another hydrocarbon gas employed as a propellant in similar applications.

Regulation

Isobutane (E943b) is approved for use as a food additive in the European Union and other regions. Its application as a propellant in aerosol sprays is considered safe, provided it is used in accordance with good manufacturing practices. 

Conclusion

Isobutane (E943b) serves as an effective propellant in aerosol cooking sprays, facilitating the convenient application of oils and other products. When used within regulated limits, it is considered safe for consumption, as it does not interact with food components or alter their properties. As with all food additives, consumers are encouraged to use products containing isobutane in accordance with manufacturer instructions.