The CAS Registry Mumber 74367-30-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,4,3,6 and 7 respectively; the second part has 2 digits, 3 and 0 respectively. Calculate Digit Verification of CAS Registry Number 74367-30: (7*7)+(6*4)+(5*3)+(4*6)+(3*7)+(2*3)+(1*0)=139 139 % 10 = 9 So 74367-30-9 is a valid CAS Registry Number.
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