Core Viewpoint - The Ministry of Emergency Management of China has announced the inclusion of five new chemical substances into the "Catalog of Hazardous Chemicals," aiming to enhance safety risk management for hazardous chemicals. Public feedback is being solicited until February 21, 2026 [1]. Group 1: New Chemical Substances - The five newly added chemical substances are 3-chloropropyne, 2-iodobenzoyl acid, 2-diazoacetyl nitrobenzyl ester, methanesulfonyl azide, and 2-methyl-2-nitrobenzoic acid [1]. - These substances are categorized as fine chemicals and are widely used in the synthesis of pharmaceutical intermediates and as reagents in organic chemical reactions [1]. Group 2: Regulatory Implications - Once included in the catalog, these substances will be legally defined as "hazardous chemicals," subjecting their entire lifecycle to strict regulatory oversight by national laws [1].