On Jan 30th 2013, China MEP issued the 2013 version of the Inventory of Existing Chemical Substances in China (IECSC 2013) in PDF. The IECSC 2013 contains 45,612 substances, among which 42,342 substances are released with detailed information, covering the CAS No. or serial number (for those without CAS No.), English and Chinese name, alias name and structural formula. The remaining 3,270 substances are claimed confidential with only the Chinese and English generic name and serial number listed. In comparison, the IECSC 2010 consists of 45,602 substances with 3,166 substances as confidential.