noun
hexavalent chromium
Technical term used in chemistry, environmental science, and industrial contexts. Refers to chromium in the +6 oxidation state, often discussed in relation to toxicity and pollution.
六価クロムは有害物質として規制されている。
Hexavalent chromium is regulated as a hazardous substance.
工場排水から六
Hexavalent chromium was detected in the factory wastewater.