The CAS Registry Mumber 131451-60-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,4,5 and 1 respectively; the second part has 2 digits, 6 and 0 respectively. Calculate Digit Verification of CAS Registry Number 131451-60: (8*1)+(7*3)+(6*1)+(5*4)+(4*5)+(3*1)+(2*6)+(1*0)=90 90 % 10 = 0 So 131451-60-0 is a valid CAS Registry Number.
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