Isobutane
Score impact
0.00
points/product
Description
E943B, known as isobutane, is a food additive classified as a propellant in the European Union. It is a saturated branched-chain hydrocarbon (C4H10) obtained mainly from natural gas or petroleum through refining and separation processes. Industrially, it is produced by catalytic cracking or fractional distillation, followed by purification to achieve food grade.
Isobutane is a colorless, odorless, and highly flammable gas with a boiling point of -11.7 °C. Its main function is to act as a propellant in food aerosols, allowing the expulsion of products such as whipped cream, spray oils, or sauces. It is also used as a packaging gas to displace oxygen and extend the shelf life of certain foods.
The history of its use as a food additive dates back to the mid-20th century, when light hydrocarbons began to be used as an alternative to chlorofluorocarbons (CFCs) due to their lower environmental impact. In the EU, isobutane was authorized as a food additive following Directive 95/2/EC and is currently regulated by Regulation (EC) 1333/2008. The European Food Safety Authority (EFSA) has evaluated isobutane on several occasions, most recently in 2016, concluding that it poses no health risk at authorized use levels.
The World Health Organization (WHO) and the Joint FAO/WHO Expert Committee on Food Additives (JECFA) have also evaluated it, establishing an acceptable daily intake (ADI) of "not specified," indicating that it is not considered necessary to set a numerical limit due to its low toxicity and the minimal amounts ingested.
Regarding food safety, isobutane is considered safe for consumers provided good manufacturing practices are followed. On labeling, it must appear as "propellant: isobutane" or "propellant: isobutane," and in some cases it may be listed as "E943B." No significant adverse effects in humans have been documented at dietary exposure levels, although inhalation in high concentrations can cause narcosis or asphyxiation, but this is not relevant in the food context.
In summary, E943B is a safe and effective food additive for its function as a propellant.
E943B (isobutane) is mainly used as a propellant in food aerosols. In the European Union, its use is authorized by Regulation (EC) 1333/2008, which states that it may be used in all foods packaged in aerosol form, without a specific quantitative limit, provided good manufacturing practices are followed. This means the amount used is the minimum necessary to achieve the desired technological effect.
Products on the Spanish market containing isobutane include aerosol whipped creams (such as Hacendado, Nestlé, or President brands), spray olive oils (such as Carbonell or Ybarra), sauces like aerosol mayonnaise, and some pastry products. It is also used in containers of whipped cream and some spray cheeses. Compared to the US FDA, isobutane is listed as GRAS (Generally Recognized as Safe) for use as a propellant in food aerosols, with conditions similar to those in Europe. In Japan, isobutane is also permitted as a propellant, although with certain restrictions on maximum concentration.
It is important to note that isobutane is not used in non-aerosol foods, as its main function is as a propellant. Use limits are not expressed in mg/kg but follow the "quantum satis" principle (the amount necessary).
Documented side effects of E943B (isobutane) in the food context are virtually nonexistent. EFSA and JECFA have evaluated isobutane and conclude that it presents no significant toxicity by oral ingestion, as it is a gas that is rapidly eliminated from the body without being metabolized. Laboratory animal studies have shown that inhalation of high concentrations can cause narcotic effects and central nervous system depression, but these levels are not reached in food use.
No carcinogenic, genotoxic, or reproductive effects have been identified at dietary exposure levels. Sensitive populations, such as children or people with respiratory diseases, are not at additional risk, as the amount ingested is minimal and does not accumulate. No interactions with medications are known. The conclusion of EFSA and WHO is that isobutane is safe for consumers under authorized conditions of use. However, in case of accidental inhalation of the gas from the container (for example, when improperly emptying an aerosol), respiratory tract irritation or dizziness could occur, but this is not related to ingestion of the additive in food.
In summary, E943B is considered a safe food additive, with no documented side effects at the amounts present in foods.
- Isobutane
- 2-Methylpropane
- R-600a
- Propane, 2-methyl-
- Branched C4 hydrocarbon
- Methylpropane
- i-butane
- Isobutane
- Trimethylmethane
- 2-Methylpropane
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