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Check Digit Verification of cas no

The CAS Registry Mumber 162274-63-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,2,2,7 and 4 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 162274-63:
127 % 10 = 7
So 162274-63-7 is a valid CAS Registry Number.
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