The CAS Registry Mumber 136693-32-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,6,6,9 and 3 respectively; the second part has 2 digits, 3 and 2 respectively. Calculate Digit Verification of CAS Registry Number 136693-32: (8*1)+(7*3)+(6*6)+(5*6)+(4*9)+(3*3)+(2*3)+(1*2)=148 148 % 10 = 8 So 136693-32-8 is a valid CAS Registry Number.
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