默克索引
Site information
默克索引（Merck Index）是由美国默克公司出版的记录化学药品、药物和生理性物质的综合性百科全书，可查询CAS号、化学式、分子量、结构式，熔点、沸点等化学信息。
Highlights
**Merck Index Highlights**
* A comprehensive database of over 100,000 chemical compounds
* Includes physical and chemical properties, uses, and safety information
* Searchable by name, formula, or structure
* Trusted resource for scientists, researchers, and students in chemistry, biology, and medicine