203204-53-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 203204-53-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,3,2,0 and 4 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 203204-53:
(8*2)+(7*0)+(6*3)+(5*2)+(4*0)+(3*4)+(2*5)+(1*3)=69
69 % 10 = 9
So 203204-53-9 is a valid CAS Registry Number.