E491 – Sorbitan monostearate
EmulsifierDescription
Mixture of partial esters of sorbitol and its mono- and dianhydrides with edible commercial stearic acid
Notes
Sorbitan monostearate, commercially known as Span 60, is produced by combining sorbitol (a sugar alcohol that occurs naturally in many fruits like apples and pears) with stearic acid (a saturated fatty acid commonly found in animal fats and some plant oils like cocoa butter and shea butter). The manufacturing process creates a "partial ester" - a molecule that acts like a bridge between water-based and oil-based ingredients, with one end attracting water and the other end attracting oil. This additive functions as an emulsifier, helping to create and maintain smooth mixtures of ingredients that would otherwise separate. You'll commonly find E491 in chocolate and confectionery products, baked goods like cakes and pastries, ice cream, whipped cream, and margarine. It's particularly valued in chocolate manufacturing because it helps create that smooth, glossy finish and prevents the white "bloom" that can appear on chocolate when cocoa butter separates. While E491 is synthetically manufactured, it's made from components that exist in nature. The stearic acid used can come from either animal sources (like beef or pork fat) or plant sources (such as palm oil or cocoa butter), so its suitability for vegetarians and vegans depends on the source material used - unfortunately, this isn't always specified on ingredient labels. The additive is approved for use worldwide and considered safe in the small amounts typically used in food production, usually less than 1% of the total product.