The CAS Registry Mumber 109367-22-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,3,6 and 7 respectively; the second part has 2 digits, 2 and 2 respectively. Calculate Digit Verification of CAS Registry Number 109367-22: (8*1)+(7*0)+(6*9)+(5*3)+(4*6)+(3*7)+(2*2)+(1*2)=128 128 % 10 = 8 So 109367-22-8 is a valid CAS Registry Number.
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