The CAS Registry Mumber 76369-35-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,6,3,6 and 9 respectively; the second part has 2 digits, 3 and 5 respectively. Calculate Digit Verification of CAS Registry Number 76369-35: (7*7)+(6*6)+(5*3)+(4*6)+(3*9)+(2*3)+(1*5)=162 162 % 10 = 2 So 76369-35-2 is a valid CAS Registry Number.