lavender can have a camphorous odour in some species). It's used a lot in the food industry to flavour sweets and cough products, and it's used in embalming, fireworks, and rust prevention. Solid camphor balls are used as a moth repellant.
In cosmetics, it's considered a plasticizer - it's used in nail polish to allow it to dry well but remain flexible - and it's added to topical pain relieving products as it is a vasodilatory substance (meaning it "refers to the widening of blood vessels"), and it offers that sensation of cooling we've been reading about with menthol and 1,8-cineole. It's often found in combination with peppermint/menthol and eucalyptus in cold treatment products, but it is not considered a cough suppressant.
Please note: There is camphor (the ketone) and camphor (the essential oil). The information above is about the ketone found in essential oils. I'll put the words "essential oil" after camphor when I'm talking about that.
Camphor is found in all manner of plants, including lavender, sage, Mexican oregon, rosemary, sweet basil, and cinnamon, to name a few.
Be careful with this essential oil! The FDA allows it at a maximum of 11% because it is poisonous. For a child, eating 2 grams could be toxic and 4 grams could be fatal! (Reference: Wikipedia, Medscape news.)
As an aside, I am so sick and tired of people telling me that propylene glycol is bad for you because it can be found anti-freeze. Being in anti-freeze doesn't make something toxic! Do you think you should avoid camphor because it's used to make dead people look nice before the funeral, repel moths, make things explode? No. Don't make something bad by association. (Although having said that, the glycols are in anti-freeze because it lowers the freezing temperature of water, which is a good thing!) Upon further thought, though, this argument isn't a great one because camphor is, in fact, toxic at relatively low doses...
Join me tomorrow for more fun with camphor - this time, the essential oil!