How safe is Dipropylene Glycol and Propylene Glycol in underarm deodorant?

Answer 1

http://www.tomsofmaine.com/toms/ifs/propylene_glycol.asp Umm. That answer, while it does provide a link that through a bit of searching does address Propylene Glycol, does not at all address Dipropylene Glycol, and answers are required to be in your own words or attributed to a source, simply providing a web address is not following guidelines. Dipropylene Glycol is a By-product of the manufacturing process of Propylene Glycol. It's not the same product. That said, both products in the concentrations used in underarm deodorant (and anti-perspiration products) are not considered an irritant, a carcinogen or toxic. Both Dipropylene Glycol and Propylene Glycol have a long history of safe usage. This said, you must remember this is not to assert that those with a sensitivity to either or both ingredients will find themselves free from the typical reactions: stinging and/or swelling and reddening of the skin.

Answer 2

Both Dipropylene Glycol and Propylene Glycol are considered safe for use in underarm deodorants when used in small concentrations. However, some individuals may be sensitive or allergic to these ingredients, resulting in skin irritation. It is advisable to perform a patch test before using products containing these ingredients to rule out any adverse reactions.