The CAS Registry Mumber 149625-02-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,9,6,2 and 5 respectively; the second part has 2 digits, 0 and 2 respectively. Calculate Digit Verification of CAS Registry Number 149625-02: (8*1)+(7*4)+(6*9)+(5*6)+(4*2)+(3*5)+(2*0)+(1*2)=145 145 % 10 = 5 So 149625-02-5 is a valid CAS Registry Number.