The CAS Registry Mumber 12167-15-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,2,1,6 and 7 respectively; the second part has 2 digits, 1 and 5 respectively. Calculate Digit Verification of CAS Registry Number 12167-15: (7*1)+(6*2)+(5*1)+(4*6)+(3*7)+(2*1)+(1*5)=76 76 % 10 = 6 So 12167-15-6 is a valid CAS Registry Number.
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