5603-20-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 5603-20-3 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,6,0 and 3 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 5603-20:
(6*5)+(5*6)+(4*0)+(3*3)+(2*2)+(1*0)=73
73 % 10 = 3
So 5603-20-3 is a valid CAS Registry Number.