The CAS Registry Mumber 1443513-40-3 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,4,3,5,1 and 3 respectively; the second part has 2 digits, 4 and 0 respectively. Calculate Digit Verification of CAS Registry Number 1443513-40: (9*1)+(8*4)+(7*4)+(6*3)+(5*5)+(4*1)+(3*3)+(2*4)+(1*0)=133 133 % 10 = 3 So 1443513-40-3 is a valid CAS Registry Number.
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