The CAS Registry Mumber 57699-95-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,6,9 and 9 respectively; the second part has 2 digits, 9 and 5 respectively. Calculate Digit Verification of CAS Registry Number 57699-95: (7*5)+(6*7)+(5*6)+(4*9)+(3*9)+(2*9)+(1*5)=193 193 % 10 = 3 So 57699-95-3 is a valid CAS Registry Number.