ACS is one of the world’s largest scientific societies and the premier home of chemistry professionals. Find career opportunities, educational resources, professional development, and much more.

a free chemical structure database providing fast text and structure search access to over 130 million structures from hundreds of data sources.

We help chemistry to change the world. Supporting the chemical science community through publishing research, membership, events, networks, education.

Chemicalbook is a platform dedicated to provide the most valuable resources for chemical industry users. Here you can get chemical information (such as chemical physical properties, safety data, Excellent china suppliers and their web addresses and etc.)by searching the name, CAS number, molecular formula, molecular weight, MDL number, EINECS number, structure.

tci is a global manufacturer of chemicals for research and development, with reagents for chemistry, life science, materials science, and analytical chemistry.

化源网提供快速cas号查询，cas no查询，msds查询，数百万化合物的专业数据，包括物化, msds, 安全信息, 合成路线及文献, 毒性，上下游，期刊文献等。

home

chemrxiv is a free-to-access pre-publication platform dedicated to early research outputs in a broad range of chemistry fields.

the organic chemistry portal offers an overview of recent topics, interesting reactions and information on important chemicals for organic chemists.