The CAS number 120511-73-1 is a unique numerical identifier assigned to a specific chemical substance by the Chemical Abstracts Service (CAS), a division of the American Chemical Society. This number is used globally to provide a unique, unmistakable identifier for chemicals and is critical for ensuring precise communication about substances in research, industry, and regulation. The CAS Registry, which houses these numbers, is the world's largest database of chemical substances, containing information on millions of organic and inorganic compounds.
The CAS number 120511-73-1 specifically identifies the chemical substance known as anastrozole. Anastrozole is an aromatase inhibitor used primarily in the treatment of breast cancer in postmenopausal women. The CAS number is important in this context because it helps researchers, healthcare providers, and regulatory bodies accurately reference anastrozole without confusion. Given that chemical names can vary and sometimes be ambiguous, the CAS number serves as a precise reference point that eliminates ambiguity and ensures consistency in the identification and study of this medication.
The assignment of a CAS number to a substance like anastrozole involves a detailed review of the chemical's structure and properties. Once assigned, the CAS number remains with the chemical forever, regardless of any changes in its name or how it is used. This system is crucial for maintaining a standardized approach to chemical identification, which is essential for scientific research, regulatory compliance, and safety protocols. For example, in pharmaceutical development and regulation, the CAS number helps ensure that all studies and regulatory documents refer to the same substance, facilitating clear communication and efficient progress through various stages of research, testing, and approval.
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