The CAS Registry Mumber 19860-87-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,9,8,6 and 0 respectively; the second part has 2 digits, 8 and 7 respectively. Calculate Digit Verification of CAS Registry Number 19860-87: (7*1)+(6*9)+(5*8)+(4*6)+(3*0)+(2*8)+(1*7)=148 148 % 10 = 8 So 19860-87-8 is a valid CAS Registry Number.
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