In order to strengthen the environmental management on chemicals, improve the measures of chemical environmental management, establish a system of new chemical substance notification in accordance with internationally typical operation, and implement the acceptances of entering WTO, the State Environmental Protection Administration (MEP) has promulgated the Provisions on the Environmental Administration of New Chemical Substances. To cooperate the implementation of the Provisions, MEP has completed the compilation of the Inventory of Existing Chemical Substances Manufactured or Imported in China (IECSC) for the purposes to identify new chemical substances and to master the status of existing chemical substances in China.

    There are 45355 chemical substances totally, where 37291 with CAS Number , and 8064 without CAS Number (or unknown). For substances without or unknown CAS number, an unique serial number was given in IECSC. There are 3088 confidential substances. The Chinese and English preferred names of these substances are not published. As a new feature, there are 32557 chemicals have their formula structures pictures.

    IECSC is a dynamic inventory. MEP will publicize the substances which have been registered in accordance with the Provisions or accord with the rules of IECSC.

    A internet-accessible version of IECSC is also available. Thank you for using IECSC. Having any comments, please don't hesitate to contact us: inventory@crc-mep.org.cn.

    The copyright of the Inventory of Existing Chemical Substancess in China (IECSC) belongs to The Chemical Registration Center of MEP (hereinafter CRC-MEP). Without authorization, any organization or individual is not allowed to copy, publish, reprint, or distribute the inventory by info network.

    CRC-MEP has never licensed to any organization or individual to copy, publish, reprint or distribute the electric edition of the inventory by means of info network. CRC-MEP does not admit the inventory issued by any other organization or individual. CRC-MEP will not bear any responsibility thereout engendered.

    Any tort, either it has already become a fact or just in process of , must be ceased. CRC-MEP reserves all the rights to take legal measures to pursuit tortfeasor's legal responsibility.