The CAS Registry Mumber 194864-22-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,4,8,6 and 4 respectively; the second part has 2 digits, 2 and 2 respectively. Calculate Digit Verification of CAS Registry Number 194864-22: (8*1)+(7*9)+(6*4)+(5*8)+(4*6)+(3*4)+(2*2)+(1*2)=177 177 % 10 = 7 So 194864-22-7 is a valid CAS Registry Number.
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