20589-57-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20589-57-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,5,8 and 9 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 20589-57:
(7*2)+(6*0)+(5*5)+(4*8)+(3*9)+(2*5)+(1*7)=115
115 % 10 = 5
So 20589-57-5 is a valid CAS Registry Number.