Toxicity: Aphtha is a neurotoxin and central nervous system depressant, which can cause confusion, headaches, lack of concentration, and symptoms of mental illness.  Butyl cellosove is highly toxic and sodium nitrite is extremely toxic.  Sodium sulfites can cause death in asthmatics.   Environmental Impact: Naphtha, sodium hypochrorite, butyl cellusolve, and highly toxic materials are considered hazardous waste. Sodium hypochlorite and chlorinated germicides can also form orano-chlorine compounds (like DDT), which are pollutants that break down slowly in the ecosystem and are stored in the fatty tissues of wildlife.  Petroleum-based products are non-renewable resources, are slow to break down in the environment, and can contain impurities, which contaminate air and water.