Industrial ethanol is ethanol standardized for its specifications: chemical purity or technical properties. To contrast, alcoholic drinks are standardized and evaluated like food products. There are various grades of industrial ethanol, for solvent, disinfectant, chemical precursor and cleaning uses. Chemically pure ethanol may also be used to manufacture alcoholic drinks, e.g. Koskenkorva. Lower-quality or waste-stream ethanol finds technical uses, and may be deliberately contaminated with poisonous or bad-tasting additives.