The CAS Registry Mumber 1283481-92-4 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,8,3,4,8 and 1 respectively; the second part has 2 digits, 9 and 2 respectively. Calculate Digit Verification of CAS Registry Number 1283481-92: (9*1)+(8*2)+(7*8)+(6*3)+(5*4)+(4*8)+(3*1)+(2*9)+(1*2)=174 174 % 10 = 4 So 1283481-92-4 is a valid CAS Registry Number.
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