Menthol is an organic compound made synthetically or obtained from the oils of corn mint, peppermint, or other mints. It is a waxy, crystalline substance, clear or white in color, which is solid at room temperature and melts slightly above.
Mequinol is a common active ingredient in topical drugs used for skin depigmentation. As a topical drug mequinol is often mixed with tretinoin, a topical retinoid.
2,4-di-tert-butylphenol is a white crystalline solid at room temperature and is typically sold in liquid form in 100kg drums. 2,4-DTBP may also be sold in tank trucks or rail cars.