Why is it important to understand the meaning of a CAS registry number?

Understanding the meaning of a CAS registry number is essential because it allows for the precise identification of chemicals. CAS, which stands for Chemical Abstracts Service, assigns a unique numerical identifier to every chemical substance. This identifier can be used universally across various databases and regulatory systems, which helps to avoid confusion that may arise from chemical names, which can vary based on language, nomenclature rules, or structural variations.

Having a standardized method of identification enhances communication in the scientific community, ensuring that researchers, manufacturers, and regulatory agencies are all referring to the same specific substance. This is crucial for safety, compliance with regulations, and accurate data tracking, facilitating effective collaboration and research.

In contrast, the other options suggest attributes that are not directly linked to the primary function of a CAS number. For instance, while hazardous information may be related to a chemical, it is not conveyed by the CAS number itself. Similarly, CAS numbers do not determine market value or serve as a historical record of a substance’s use or properties. This reinforces the importance of the unique identification aspect provided by the CAS registry number.