Ester gum, còn được gọi là glycerol ester of wood rosin, is được sản xuất bởi the esterification of purified wood rosin with cấp thực phẩm glycerol. It is a key ingredient in the beverage ngành công nghiệp where it chức năngs as a weighting or density-adjusting agent for citrus oil-based flavor emulsions.
By increasing the specific gravity of flavor oils to match the aqueous phase, ester gum prevents separation and cloudiness loss in soft drinks and juice beverages. It also serves as a plasticizer and base ingredient in chewing gum công thức. Ester gum is approved for food use in many countries and meets international food additive thông số kỹ thuậts.