20503-63-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20503-63-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,5,0 and 3 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 20503-63:
(7*2)+(6*0)+(5*5)+(4*0)+(3*3)+(2*6)+(1*3)=63
63 % 10 = 3
So 20503-63-3 is a valid CAS Registry Number.