The Inventory of Existing Substances in China (IECSC) contains all the chemical substances used in China between 1992 and 2003. If a substance is not included in the IECSC, the production, import or processing use of this substance in China without notification is prohibited. Following the online and formal comprehensive searches, if the substance is not included on the IECSC, it is a currently a new substance in China. The 2010 IECSC inventory includes 45,602 substances.