203450-53-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 203450-53-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,3,4,5 and 0 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 203450-53:
(8*2)+(7*0)+(6*3)+(5*4)+(4*5)+(3*0)+(2*5)+(1*3)=87
87 % 10 = 7
So 203450-53-7 is a valid CAS Registry Number.