The CAS Registry Mumber 149494-64-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,9,4,9 and 4 respectively; the second part has 2 digits, 6 and 4 respectively. Calculate Digit Verification of CAS Registry Number 149494-64: (8*1)+(7*4)+(6*9)+(5*4)+(4*9)+(3*4)+(2*6)+(1*4)=174 174 % 10 = 4 So 149494-64-4 is a valid CAS Registry Number.
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