The CAS Registry Mumber 1414782-20-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,1,4,7,8 and 2 respectively; the second part has 2 digits, 2 and 0 respectively. Calculate Digit Verification of CAS Registry Number 1414782-20: (9*1)+(8*4)+(7*1)+(6*4)+(5*7)+(4*8)+(3*2)+(2*2)+(1*0)=149 149 % 10 = 9 So 1414782-20-9 is a valid CAS Registry Number.
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