However, isopropyl alcohol is used as rubbing alcohol and is applied to the skin. Isopropyl alcohol is toxic by ingestion and inhalation with a TLV of 400 ppm. Butyl alcohol is toxic by prolonged inhalation, is an eye irritant, and is absorbed through the skin. The TLV ceiling is 50 ppm in air. There are also some alcohols that have chlorine added to the compound, which increases their toxicity. For example, ethylene chlorohydrin is an alcohol that