作业帮请问化工中CAS是什么啊?
来源：学生作业帮助网 编辑：作业帮 时间：2024/04/29 06:11:26
请问化工中CAS是什么啊?
请问化工中CAS是什么啊?
请问化工中CAS是什么啊?
CAS号(Chemical Abstracts Service)是美国化学文摘登记号,该号是用来判定检索有多个名称的化学物质信息的重要工具.
What is CAS?
A.CAS (Chemical Abstracts Service) is a division of the American Chemical Society.We are located in Columbus,Ohio.CAS is the producer of the largest and most comprehensive databases of chemical information.Our principal databases are Chemical Abstracts (CA) which contains over 23 million document records from the chemical journal and patent literature,and Registry which contains over 24 million substance and 50 million sequence records
CAS also operates the STN International online service with partner organizations in Europe and Asia.STN provides access to nearly 200 databases covering topics such as science,technology,patents,and business information.
类似与化合物的身份证 是唯一的
如果有新的化合物出现 就像刚出生婴儿一样 给一新号
如4-吡啶甲醇 CAS为586-95-8
通常越简单的物质数字越少 越短
问为什么 因为早先发现呗
硫化钙也是这个东西。