200420-49-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 200420-49-1 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, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 200420-49:
(8*2)+(7*0)+(6*0)+(5*4)+(4*2)+(3*0)+(2*4)+(1*9)=61
61 % 10 = 1
So 200420-49-1 is a valid CAS Registry Number.