Glycerol ester of wood rosin
Glycerol ester of wood rosin, also known as glyceryl abietate or ester gum, is an oil-soluble food additive (E number E445). Its high density helps keep oils in suspension in water and this property is why it is often used as a beverage stabilizer. It is also used as a base in the production of chewing-gum.
In the creation of Glycerol ester of wood rosin, highly refined wood rosin (freed of all extraneous impurities and purified to a beverage-grade ester gum) is combined with glycerin to produce glycerol ester. This results in a fragrant, "warm" tasting, sweet substance (around 0.6 times that of cane sugar).
Glycerol ester of wood rosin serves as an alternative to brominated vegetable oil in citrus oil flavored soft drinks. In some cases both ingredients are used together.
- WHO Food Additives Series 35: 836. Glycerol ester of wood rosin
- Ruth Winter, M.S. (2009). A Consumer's Dictionary of Food Additives, 7th Edition. New York: Three Rivers Press.
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