CAS Query Help:

1. Existing vocabulary of Chemical CAS Dictionary 1,800,000 pieces.
   
   
2. You can input the Chinese name, English name, alias, or CAS registration number (US Chemical Abstracts Registry Number) of the chemical for retrieval.
   
   For example, the following keywords can all search for tartaric acid:
   
   Enter an English name or alias to search, such asDL-Tartaric Acid Tartaric Acid
   
   Enter the CAS registration number to search, such as133-37-9