E912 – Montan wax
Coating for citrus fruits.Description
Hard, brittle, light-yellow to brown wax derived from lignite coal by solvent extraction; composed primarily of long-chain (C24-C30) carboxylic acids, esters, alcohols, and ketones
Notes
Montan acid wax comes from an unusual source - it's extracted from lignite, a type of brown coal that formed millions of years ago from compressed plant matter. The extraction process involves treating the lignite with solvents to dissolve and separate the waxy components, followed by purification and refining to remove any impurities. The result is a hard, light-yellow wax that's quite different from animal or plant-based waxes, representing ancient organic matter that's been transformed over geological time. This wax serves as a glazing agent, providing a durable, shiny coating that's particularly valued for its hardness and resistance to wear. You'll most commonly find montan acid wax used on fresh fruits and vegetables, especially apples and other produce that benefits from a long-lasting protective coating. It's also used in some pharmaceutical applications for coating tablets and capsules, where its durability and neutral taste are advantages. Although montan acid wax originates from ancient plant material, it's considered a mineral wax due to its geological formation process, making it suitable for vegetarian and vegan diets. It's generally acceptable under halal and kosher dietary laws as well. The wax has been safely used in food applications for many years, with regulatory approval in numerous countries, though like other glazing agents, it's designed for surface coating rather than consumption as a food ingredient itself.