200420-53-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 200420-53-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,0,4,2 and 0 respectively; the second part has 2 digits, 5 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 200420-53:
(8*2)+(7*0)+(6*0)+(5*4)+(4*2)+(3*0)+(2*5)+(1*3)=57
57 % 10 = 7
So 200420-53-7 is a valid CAS Registry Number.