On August 20, 2021, Taiwan’s Environmental Protection Administration (EPA) listed ammonium nitrate and hydrogen fluoride as concerned chemicals. The handlers shall obtain approval for their manufacture, import, sale, use, storage, etc. and report monthly online for their handlings. Meanwhile, the online sale is prohibited. The accident prevention and emergency response regulations shall be followed. In addition, the commercially available HFCS products must be labelled to prevent accidents caused by improper use.