69189-20-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 69189-20-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,9,1,8 and 9 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 69189-20:
(7*6)+(6*9)+(5*1)+(4*8)+(3*9)+(2*2)+(1*0)=164
164 % 10 = 4
So 69189-20-4 is a valid CAS Registry Number.