The CAS Registry Mumber 94741-36-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,4,7,4 and 1 respectively; the second part has 2 digits, 3 and 6 respectively. Calculate Digit Verification of CAS Registry Number 94741-36: (7*9)+(6*4)+(5*7)+(4*4)+(3*1)+(2*3)+(1*6)=153 153 % 10 = 3 So 94741-36-3 is a valid CAS Registry Number.