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Check Digit Verification of cas no

The CAS Registry Mumber 444005-83-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,4,4,0,0 and 5 respectively; the second part has 2 digits, 8 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 444005-83:
118 % 10 = 8
So 444005-83-8 is a valid CAS Registry Number.
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