The CAS Registry Mumber 111922-52-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,1,9,2 and 2 respectively; the second part has 2 digits, 5 and 2 respectively. Calculate Digit Verification of CAS Registry Number 111922-52: (8*1)+(7*1)+(6*1)+(5*9)+(4*2)+(3*2)+(2*5)+(1*2)=92 92 % 10 = 2 So 111922-52-2 is a valid CAS Registry Number.
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