Montanic acid esters
Score impact
0.00
points/product
Description
The food additive E912, known as montanic acid esters, is a mixture of esters of long-chain fatty acids (mainly montanic acid, C28) with polyhydric alcohols such as glycerol or ethylene glycol. It is obtained from montan wax, a natural wax extracted from lignite (brown coal) through refining and esterification processes. Industrially, montan wax is purified, hydrolyzed to obtain free fatty acids, and then esterified with alcohols such as glycerol under controlled temperature and pressure conditions.
The final product is a complex mixture of esters, mainly monoesters and diesters. Physically, it appears as a waxy solid from white to pale yellow, insoluble in water, soluble in hot organic solvents, with a melting point between 80-90 °C. Its main function in food is as a coating (glazing) agent and anti-caking agent, forming a protective layer that prevents moisture loss and improves appearance.
Historically, it was authorized in the European Union in 1995 (Directive 95/2/EC) and re-evaluated by EFSA in 2018. The European Food Safety Authority (EFSA) concluded that no numerical acceptable daily intake (ADI) is needed due to low exposure and the absence of adverse effects in available studies. The World Health Organization (WHO) has not established a specific ADI.
Regarding food safety, it is considered safe at authorized use levels, although its use has declined due to a preference for natural alternatives. On labeling, it must be listed as 'montanic acid esters' or its E number.
E912 is mainly used as a coating agent on fresh fruits and vegetables to delay dehydration and improve shine, as well as in confectionery products (chewing gum, hard candies) and nuts to prevent sticking.
In the Spanish market, it is found in some chewing gums and hard candies, although its use is limited. According to EC Regulation 1333/2008, it is authorized in 'fresh fruits and vegetables' (surface treatment only) with a maximum limit of 500 mg/kg, and in 'confectionery products' (including chewing gum) with a limit of 200 mg/kg. In the United States, the FDA does not list it as generally recognized as safe (GRAS), so it is not allowed in foods. In Japan, it is approved as a coating agent for citrus fruits. Comparatively, the EU has more permissive regulations than the US, but actual use is low due to the trend toward more natural additives.
Toxicological studies on E912 are limited. EFSA, in its 2018 re-evaluation, examined oral toxicity studies in rats and dogs with high doses (up to 5000 mg/kg body weight/day) and found no significant adverse effects. No effects on reproduction, development, or carcinogenicity were observed.
The biological mechanism is based on the fact that montanic acid esters are not significantly absorbed in the gastrointestinal tract due to their high molecular weight and low solubility, being mostly excreted in feces. No allergic reactions or interactions with medications have been documented. Sensitive populations (children, pregnant women) present no additional risks according to available data. EFSA concluded that there is no evidence of adverse effects at current exposure levels, and no numerical ADI was established. The WHO agrees that the additive is safe under authorized conditions of use.
Therefore, it is considered a safe additive with no documented side effects.
- Montanoic acid esters
- Montan wax esters
- Octacosanoic acid esters
- Esterified montan wax
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