603-21-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 603-21-4 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 6,0 and 3 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 603-21:
(5*6)+(4*0)+(3*3)+(2*2)+(1*1)=44
44 % 10 = 4
So 603-21-4 is a valid CAS Registry Number.