The CAS Registry Mumber 76296-43-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,6,2,9 and 6 respectively; the second part has 2 digits, 4 and 3 respectively. Calculate Digit Verification of CAS Registry Number 76296-43: (7*7)+(6*6)+(5*2)+(4*9)+(3*6)+(2*4)+(1*3)=160 160 % 10 = 0 So 76296-43-0 is a valid CAS Registry Number.