20009-54-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20009-54-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,0,0 and 9 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 20009-54:
(7*2)+(6*0)+(5*0)+(4*0)+(3*9)+(2*5)+(1*4)=55
55 % 10 = 5
So 20009-54-5 is a valid CAS Registry Number.