189565-91-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 189565-91-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,9,5,6 and 5 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 189565-91:
(8*1)+(7*8)+(6*9)+(5*5)+(4*6)+(3*5)+(2*9)+(1*1)=201
201 % 10 = 1
So 189565-91-1 is a valid CAS Registry Number.