This standard specifies the requirements, test methods, inspection rules and marking, packaging, transportation, storage, quality certificate and order form (or contract) content of cadmium chloride. This standard applies to cadmium chloride produced by reacting cadmium oxide as raw material with hydrochloric acid, and is mainly used as an activator for cadmium telluride solar cells. It is also suitable for printing and dyeing auxiliaries, agents for manufacturing copy paper and photographic paper in the photosensitive industry, and brightening agents for manufacturing special mirrors in the optical instrument industry.