Castrol Optileb™ WOM Range (previously called Whitemor™ WOM Range) of Medicinal White Oils are highly refined mineral oils which comply with the purity requirements of the various national Pharmacopoeias for Liquid Paraffins.Optileb WOM Medicinal White Oils are used in the pharmaceutical, cosmetic and plastics industries and for all other applications where extremely high standards of purity are required. Optileb WOM Medicinal White Oils also comply with the purity requirements of:- Mineral Hydrocarbons in Food Regulations 1966 (SI No. 1073), British, European and United States Pharmacopoeias.