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Check Digit Verification - CAS, Chemical Abstracts Service Home Page
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日期：2025-05-26
Check Digit Verification of CAS Registry Number ... A 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....看更多
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