68919-91-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 68919-91-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,8,9,1 and 9 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 68919-91:
(7*6)+(6*8)+(5*9)+(4*1)+(3*9)+(2*9)+(1*1)=185
185 % 10 = 5
So 68919-91-5 is a valid CAS Registry Number.