The chemical name for PbS2 is lead (IV) sulfide. The IV is to show that the lead in the compound has an oxidation state of +4. Lead also has an oxidation state of +2.
Lead is a naturally occurring, corrosion-resistant metal. It has been used for thousands of years dating to the Roman era. Lead builds up in the body and has negative health effects. It can lead to decreased IQ in children and delayed puberty. In adults, it causes kidney problems, increased blood pressure and decreased fertility. Lead is commonly used for radiation protection in medical facilities due to its high density.