The CAS Registry Mumber 222727-00-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,2,7,2 and 7 respectively; the second part has 2 digits, 0 and 0 respectively. Calculate Digit Verification of CAS Registry Number 222727-00: (8*2)+(7*2)+(6*2)+(5*7)+(4*2)+(3*7)+(2*0)+(1*0)=106 106 % 10 = 6 So 222727-00-6 is a valid CAS Registry Number.
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