The CAS Registry Mumber 191546-07-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,1,5,4 and 6 respectively; the second part has 2 digits, 0 and 7 respectively. Calculate Digit Verification of CAS Registry Number 191546-07: (8*1)+(7*9)+(6*1)+(5*5)+(4*4)+(3*6)+(2*0)+(1*7)=143 143 % 10 = 3 So 191546-07-3 is a valid CAS Registry Number.
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