The CAS Registry Mumber 66212-60-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,2,1 and 2 respectively; the second part has 2 digits, 6 and 0 respectively. Calculate Digit Verification of CAS Registry Number 66212-60: (7*6)+(6*6)+(5*2)+(4*1)+(3*2)+(2*6)+(1*0)=110 110 % 10 = 0 So 66212-60-0 is a valid CAS Registry Number.
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