Toxicity: Naphtha, diglycol laurate, amyl acetate, and mineral spirits are neurotoxins and central nervous system depressant, which can cause confusion, headaches, lack of concentration, and symptoms of mental illness. Diglycol laurate can also be a liver and kidney poison.  Mineral spirits can cause upper respiratory tract irritation and can contain impurities including the carcinogen benzene. Environmental Impact: Napthas and mineral spirits are considered hazardous waste.  Petroleum-based products such as mineral spirits are non-renewable resources, are slow to break down in the environment, and can contain impurities, which contaminate air and water