The CAS Registry Mumber 67762-35-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,7,7,6 and 2 respectively; the second part has 2 digits, 3 and 5 respectively. Calculate Digit Verification of CAS Registry Number 67762-35: (7*6)+(6*7)+(5*7)+(4*6)+(3*2)+(2*3)+(1*5)=160 160 % 10 = 0 So 67762-35-0 is a valid CAS Registry Number.