The CAS Registry Mumber 158146-60-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,5,8,1,4 and 6 respectively; the second part has 2 digits, 6 and 0 respectively. Calculate Digit Verification of CAS Registry Number 158146-60: (8*1)+(7*5)+(6*8)+(5*1)+(4*4)+(3*6)+(2*6)+(1*0)=142 142 % 10 = 2 So 158146-60-2 is a valid CAS Registry Number.
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