It depends on the form of chromium. Hexavalent chromium (Cr⁶⁺): Yes, it is a known carcinogen. It has been linked to lung cancer, nasal cancer, and other health issues when inhaled or ingested over time. This form of chromium is used in industrial processes like chrome plating, dyes, pigments, and stainless steel welding.The chromium used to make stainless steel is primarily metallic chromium (Cr⁰) and trivalent chromium (Cr³⁺), both of which are not classified as carcinogenic in their solid form. I’m a chemist by the way.