The CAS Registry Mumber 62653-46-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,2,6,5 and 3 respectively; the second part has 2 digits, 4 and 6 respectively. Calculate Digit Verification of CAS Registry Number 62653-46: (7*6)+(6*2)+(5*6)+(4*5)+(3*3)+(2*4)+(1*6)=127 127 % 10 = 7 So 62653-46-7 is a valid CAS Registry Number.
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