The CAS Registry Mumber 196303-41-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,9,6,3,0 and 3 respectively; the second part has 2 digits, 4 and 1 respectively. Calculate Digit Verification of CAS Registry Number 196303-41: (8*1)+(7*9)+(6*6)+(5*3)+(4*0)+(3*3)+(2*4)+(1*1)=140 140 % 10 = 0 So 196303-41-0 is a valid CAS Registry Number.
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