Cas Registry Number

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Cas Registry Number

What is a CAS Registry Number CAS RN Each CAS Registry Number CAS RN identifier Is a unique numeric identifier Designates only one substance Has no chemical significance Is a link to a wealth of information about a specific chemical substance What does a CAS Registry Number look like CAS Registry Services can confirm CA Index Names or CAS Registry Numbers for known substances, and assign a CAS Registry Number, and provide a substance name, chemical structure, process description, or sequence, for new.

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CAS Assigns The 100 Millionth CAS Registry Number To A Substance

Cas Registry NumberA CAS Registry Number ® includes up to 10 digits which are separated into 3 groups by hyphens. The first part of the number, starting from the left, has 2 to 7 digits; the second part has 2 digits. The final part consists of a single check digit. The check digit is developed by following a standard calculation shown below. A CAS Registry Number also referred to as CAS RN or informally CAS Number is a unique identification number assigned by the Chemical Abstracts Service CAS in the US to every chemical substance described in the open scientific literature in order to index the substance in the CAS Registry

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