The CAS Registry Mumber 148113-74-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,8,1,1 and 3 respectively; the second part has 2 digits, 7 and 4 respectively. Calculate Digit Verification of CAS Registry Number 148113-74: (8*1)+(7*4)+(6*8)+(5*1)+(4*1)+(3*3)+(2*7)+(1*4)=120 120 % 10 = 0 So 148113-74-0 is a valid CAS Registry Number.
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