The CAS Registry Mumber 193416-22-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,3,4,1 and 6 respectively; the second part has 2 digits, 2 and 2 respectively. Calculate Digit Verification of CAS Registry Number 193416-22: (8*1)+(7*9)+(6*3)+(5*4)+(4*1)+(3*6)+(2*2)+(1*2)=137 137 % 10 = 7 So 193416-22-7 is a valid CAS Registry Number.
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