Hazardous materials are materials that pose a risk to people or to the environment.
There are two categories of hazardous household products and two specific sets of federal regulations for their labels. Labels provide you with the information you need to protect yourself, others, pets, and the environment. For maximum protection, one should consult the label before buying, using, storing or disposing of any hazardous products. Classification of Hazardous Materials There are four major classifications of hazardous materials. A few common corrosives include metal cleaners with phosphoric acid, drain cleaners that contain sulfuric acid, spot rust removers with hydro-fluoric acid and drain cleaners containing sodium hydroxide or lye.