Methanol, sometimes called wood alcohol, is a colorless, flammable liquid most often used as an industrial solvent, fuel additive, or as feed-stock for the production of other useful chemicals like formaldehyde. It is toxic to humans and unsuitable for use in food, healthcare or cosmetics applications. Methanol has also been used as a traditional denaturant for ethanol, the product being known as “denatured alcohol”.
SDA 40B is used extensively in the production of perfumes, cosmetics, and hand sanitizer. This product is denatured with Bitrex, an intensely bitter but odorless compound that renders the alcohol undrinkable. A permit may be required to use this product.