663203-66-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 663203-66-5 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,6,3,2,0 and 3 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 663203-66:
(8*6)+(7*6)+(6*3)+(5*2)+(4*0)+(3*3)+(2*6)+(1*6)=145
145 % 10 = 5
So 663203-66-5 is a valid CAS Registry Number.