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Chemical Abstracts Service CAS Number

What is a CAS Number?

A CAS Number is a unique identifier assigned by the Chemical Abstracts Service (CAS) to each chemical substance documented in scientific literature. This numerical code uniquely identifies substances, encompassing compounds, polymers, biological sequences, mixtures, and alloys. The Chemical Abstracts Service, a division of the American Chemical Society, is responsible for assigning these numbers.

As of now, the CAS Registry includes over two hundred million unique organic and inorganic substances, including approximately seventy million biological sequences. This immense database is updated daily, with around 15,000 new substances added each day. This constant updating reflects the dynamic nature of scientific research and the continuous discovery of new compounds.

Format of CAS Numbers

A CAS Number is formatted in three parts separated by hyphens. The first part consists of 2 to 7 digits, the second part has 2 digits, and the third part is a single check digit. For example, the CAS number for water is 7732-18-5. These numbers are arranged in ascending order and do not carry any intrinsic meaning. The check digit is calculated through a specific algorithm, ensuring the integrity of the number.

Chemical Abstracts Service Cas Number Meaning

Why is the CAS Number Important?

In the world of chemistry and biochemistry, substances often have multiple names and can be referenced in various ways. This multiplicity can lead to confusion and misidentification. The CAS Registry Number solves this problem by providing a unique identifier for each substance. This ensures accurate identification and facilitates easier retrieval of information in databases. Essentially, the CAS Number acts as a chemical substance’s ID card, distinguishing it from all others.

Chemical databases extensively use Chemical Abstracts Service (CAS) Number for retrieving information, making them crucial in research and industry. Whether you are looking up a compound’s properties, searching for safety data sheets, or verifying regulatory compliance, the CAS number ensures you get precise and relevant results.

The Role of CAS Numbers in Research and Industry

In scientific research, accurate identification of substances is paramount. CAS Registry Numbers eliminate ambiguities and streamline the process of locating detailed information about a chemical. Researchers rely on these numbers to access experimental data, synthesis methods, and references in scientific literature.

In the chemical industry, CAS numbers are indispensable for regulatory compliance, inventory management, and safety protocols. Companies use these identifiers to track chemicals, ensure proper labeling, and adhere to international standards and regulations.

Chemical Abstracts Service CAS Number

Conclusion

The CAS Number is an essential tool in the realms of chemistry and biochemistry. By providing a unique identifier for each chemical substance, it eliminates confusion and enhances the accuracy of information retrieval. The ever-expanding CAS Registry, with its extensive coverage and daily updates, reflects the continuous advancements in scientific research. As a fundamental aspect of chemical databases, CAS numbers facilitate research, industry operations, and regulatory compliance, cementing their importance in modern science and technology.

By understanding and utilizing Chemical Abstracts Service CAS Number, scientists and industry professionals can ensure precise communication, enhance data management, and support the ongoing development of chemical research and applications.

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