The CAS Registry Mumber 13762-11-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,3,7,6 and 2 respectively; the second part has 2 digits, 1 and 1 respectively. Calculate Digit Verification of CAS Registry Number 13762-11: (7*1)+(6*3)+(5*7)+(4*6)+(3*2)+(2*1)+(1*1)=93 93 % 10 = 3 So 13762-11-3 is a valid CAS Registry Number.