Toxicity: Organic solvents, naphtha, and petroleum-based waxes are neurotoxins and central nervous system depressant, which can cause confusion, headaches, lack of concentration, and symptoms of mental illness. Organic solvents also commonly contain impurities such as the carcinogen benzene and can cause respiratory irritation.   Butyl cellosove is very toxic.  Phosphoric acid and ammonia are highly corrosive.   Environmental Impact: Organic solvents, naphtha, petroleum-based waxes, ammonia and butyl cellosove are considered hazardous waste.  Complex phosphates cause algae bloom.   Petroleum-based products are non-renewable resources, are slow to break down in the environment, and can contain impurities, which contaminate air and water.