About ICCHEM2019 2019 3rd International Conference on Chemical and Molecular Sciences (ICCHEM2019) (http://www.icchem.org/2019/en/home) is a platform for academic communications between specialists and scholars in the fields related to chemical and molecular sciences. ICCHEM2019 will be held in Hangzhou, China during Dec. 18-20, 2019. Hangzhou is the capital of Zhejiang Province and one of the seven ancient capitals of China. Publication 2019 3rd International Conference on Chemical and Molecular Sciences (ICCHEM2019) accepts original and unpublished papers. Both Full paper and Abstract are welcomed. Full papers accepted by the conference will be published online in the following journals of Science Publishing Group (http://www.sciencepublishinggroup.com). The journals have been indexed and abstracted by WorldCat, CrossRef, Electronic Journals Library, CNKI, Zeitschriftendatenbank, EZB, ResearchBib, Polish Scholarly Bibliography, Wissenschaftszentrum Berlin, etc. Modern Chemistry (MC) http://www.sciencepublishinggroup.com/j/mc ISSN Print: 2329-1818 ISSN Online: 2329-180X Science Journal of Chemistry (SJC) http://www.sciencepublishinggroup.com/j/sjc ISSN Print: 2330-0981 ISSN Online: 2330-099X International Journal of Computational and Theoretical Chemistry (IJCTC) http://www.sciencepublishinggroup.com/j/ijctc ISSN Print: 2376-7286 ISSN Online: 2376-7308 American Journal of Chemical Engineering (AJCHE) http://www.sciencepublishinggroup.com/j/ajche ISSN Print: 2330-8605 ISSN Online: 2330-8613 Advances in Biochemistry (AB) http://www.sciencepublishinggroup.com/j/ab ISSN Print: 2329-0870 ISSN Online: 2329-0862 Science Discovery (SD) http://www.sciencepublishinggroup.com/j/sd ISSN Print: 2331-0642 ISSN Online: 2331-0650