(c) 90% alcohol + 9% methanol + pyridine.
Methylated spirits also known as Denatured alcohol or wood spirit or denatured rectified spirit, contains 90% alcohol, 9% methanol and pyridine, etc. The additives in ethanol make it poisonous, bad-smelling, nauseating to discourage the consumption of alcohol. To avoid the high tax and regulations on drinking alcohol, denatured alcohol was formed for industrial, disinfecting, and non-drinking uses.
Methylated spirits are used as fuel for an alcohol burner and as a solvent in the chemical reactions, paints, and varnish industries. Denatured alcohol is also used to disinfectant, sterilize medical equipment, as a window cleaner, and there are many more uses.