The CAS Registry Mumber 133927-67-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,3,9,2 and 7 respectively; the second part has 2 digits, 6 and 7 respectively. Calculate Digit Verification of CAS Registry Number 133927-67: (8*1)+(7*3)+(6*3)+(5*9)+(4*2)+(3*7)+(2*6)+(1*7)=140 140 % 10 = 0 So 133927-67-0 is a valid CAS Registry Number.
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