The CAS Registry Mumber 913322-72-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 9,1,3,3,2 and 2 respectively; the second part has 2 digits, 7 and 2 respectively. Calculate Digit Verification of CAS Registry Number 913322-72: (8*9)+(7*1)+(6*3)+(5*3)+(4*2)+(3*2)+(2*7)+(1*2)=142 142 % 10 = 2 So 913322-72-2 is a valid CAS Registry Number.
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