This issue is considered to be important because of the need for clarity when identifying any critical substance or substances in a mixture of substances for listing under Annexes A, B and/or C of the Stockholm Convention.
它认为这一问题非常重要，因为在为了将物质列入《斯德哥尔摩公约》附件A、B和（或)C时必须确定一种物质混合物中的任何关键物质。