How is Propylene Glycol made?
Propylene glycol can be either made from propylene oxide or glycerol. Glycerol is a by-product of bio-diesel. Propylene oxide is an organic compound that is industrially used. It is used in the production of polyurethane plastics such as high performance adhesives and sealants, foam seats, foam insulation panels, spandex fibers, and hard plastics. Propylene oxide is yet produced from another source: propene or propylene. It is made by either hydro-clorination or oxidation. Propene, on the other hand, is a by-product of non-renewable fossil fuel processing. In essence, propylene glycol is a by-product of bio-diesel or non-renewable fossil fuels such as natural gas, coal, and petroleum. What Products Contain Propylene Glycol? Many consumer products contain propylene glycol. Propylene glycol is used as an additive in both pharmaceuticals (both vitamins and prescription medications). It is also used in alcohol beverages such as orange bitters as an emulsifier agent. Personal hygiene produc
