2603-61-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 2603-61-4 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 2,6,0 and 3 respectively; the second part has 2 digits, 6 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 2603-61:
(6*2)+(5*6)+(4*0)+(3*3)+(2*6)+(1*1)=64
64 % 10 = 4
So 2603-61-4 is a valid CAS Registry Number.