What is E943a?
Butane (E943a) is a propellant used in some food manufacturing and dispensing applications. Goodnessly rates it Caution as a prompt to notice the role of processing gases.
E943a is a hydrocarbon gas used to propel or dispense some foods from pressurised packaging. It is not used for sweetness, colour or preservation.
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What is Butane?
E943a is a hydrocarbon gas used to propel or dispense some foods from pressurised packaging. It is not used for sweetness, colour or preservation.
What's it used for?
- Propelling food from pressurised containers
- Supporting dispensing of selected foams and sprays
- Helping deliver a consistent texture during service
Where you'll find E943a on the shelf
It is most relevant to aerosol-style food products and professional or packaged dispensing systems.
Is E943a safe? What the regulators say
Butane is a processing aid or propellant in specified uses, so the finished product and packaging rule matter as much as the additive number.
| Region | Status | What this means |
|---|---|---|
| AU/NZ Australia & New Zealand (FSANZ) | Permitted with conditions | FSANZ lists butane as additive 943a in Schedule 15; use is limited by the applicable food category and conditions. |
| EU European Union (EFSA) | Authorised as a propellant with conditions | E943a is included in the EU Union list for specified uses. The authorisation is use-specific and does not mean the gas remains in the food at a meaningful level. |
| US United States (FDA) | Permitted for specified food uses | FDA regulations include butane in the relevant food-additive/processing framework for specified uses; check the applicable section and formulation. |
Caution is about noticing a processing gas and the product format, not a claim that authorised use causes a health outcome.
- FSANZ Food Standards Code, Schedule 15, additive 943a.
- EUR-Lex Regulation (EC) No 1333/2008 Union list, E943a.
- FDA eCFR food-additive framework for processing aids and propellants.
This section is checked periodically rather than continuously — if you're reading this well after the date above, it's worth confirming nothing has changed before citing it.
Who might want to limit or avoid it
- People who prefer to minimise aerosol-style packaging
- People comparing pressurised food products
- People who need to follow specific dietary or occupational advice
Goodnessly rates E943a Caution as a practical prompt to understand the function and packaging rather than as a blanket safety verdict.
How to spot it on a label
Look for:
- Butane
- 943a or E943a
- Propellant (943a)
- Food propellant
The name may appear with the number or under a functional class such as propellant.
Related additives
Frequently asked questions
What is E943a?
E943a is butane, a propellant used in specified food dispensing applications.
Is E943a permitted?
E943a is permitted with conditions in Australia/New Zealand and the EU, with specified US food-use provisions.
Does it stay in the food?
Its intended role is to propel or dispense the product; the amount remaining depends on the product and process.
How does Goodnessly rate E943a?
Goodnessly rates E943a (butane) as Caution.
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