The CAS Registry Mumber 1211323-72-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,2,1,1,3,2 and 3 respectively; the second part has 2 digits, 7 and 2 respectively. Calculate Digit Verification of CAS Registry Number 1211323-72: (9*1)+(8*2)+(7*1)+(6*1)+(5*3)+(4*2)+(3*3)+(2*7)+(1*2)=86 86 % 10 = 6 So 1211323-72-6 is a valid CAS Registry Number.
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