The Chemical Abstracts Service Registry assigns a CAS number, which stands for Chemical Abstracts Service number, to every chemical compound that has existed since the early 1900. It is affiliated with the American Chemical Society, and the numbers assigned to compounds correspond to the order in which new chemicals are discovered.
The significance of the number about the chemical
A compound’s numerical representation is limited to ten digits, with hyphens used to divide it into three pieces. The right-most digit, known as the check digit, is used to validate the number’s validity and uniqueness.
The CAS number is unique to a compound and has no bearing on the chemical formula or the substance itself.
What is the value of the CAS number?
The importance of knowing your CAS number is that it allows you to avoid confusion when recognizing compounds and gives you access to a wealth of information.
It is the most dependable platform in use around the world, and it acts as a link between numerous nomenclature phrases that describe substances. Validation is simple and reliable.
An illustration of the applicability of CAS No.
Ethanol is a highly common chemical that goes by a variety of names.
Absolute booze
Alcohol
The spirit of Cologne
Alcohol derived from ethyl
hydrate of ethyl
Hydroxide of ethyl
Ethylol
Its formula can be written as C23H29Cl2NO, C2H6O, CH3CH2OH, or C2H5OH, among others. With so many distinct ways to refer to the same substance, CAS No. 69759-61-1, 64-17-5, and easy identification can help to clear up the confusion.
Conclusion
Although the stated example is simplistic, recognizing stereoisomers with a CAS number is a godsend and the quickest and most reliable approach to identifying each chemical.
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