Slack Wax MMO (Medium Machine Oil) is a petroleum-derived semi-solid wax produced as a byproduct of lubricating oil refining from the medium machine oil distillate fraction. It is classified under CAS No. 5), a melting point of 58–64°C, and an oil content of 5–15% in Bio Green Wax's specification.
MMO is primarily valued as the main feedstock for emulsifying wax (E-wax) production used in cosmetics and personal care products, and is also widely used in hot-melt adhesives, rubber, and textile processing.