Bacterial infections such as pneumonia often cause pleurisy. It can also be caused by a virus such as the flu, or by a fungus. Some other things that can cause pleurisy to strike are: Lung cancer. A blood clot in the lung. Other types of cancer that affect the lungs or pleura.
FDA Code of Federal Regulations for Hexylene Glycol and Dipropylene Glycol. Butylene Glycol, Hexylene Glycol, Ethoxydiglycol and Dipropylene Glycol may be used in cosmetics and personal care products marketed in Europe according to the general provisions of the Cosmetics Regulation of the European Union.
When propylene glycol USP/EP (pharmaceutical grade) is used in food, you will find it labelled as E 1520. Used in animal feed is not labelled, propylene glycol is an authorized feed material. In cosmetics there is no requirement for an E-number, you will find propylene glycol listed as such in the ingredient list.