26391-89-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 26391-89-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,6,3,9 and 1 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 26391-89:
(7*2)+(6*6)+(5*3)+(4*9)+(3*1)+(2*8)+(1*9)=129
129 % 10 = 9
So 26391-89-9 is a valid CAS Registry Number.