The CAS Registry Mumber 245681-60-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,4,5,6,8 and 1 respectively; the second part has 2 digits, 6 and 0 respectively. Calculate Digit Verification of CAS Registry Number 245681-60: (8*2)+(7*4)+(6*5)+(5*6)+(4*8)+(3*1)+(2*6)+(1*0)=151 151 % 10 = 1 So 245681-60-1 is a valid CAS Registry Number.
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