91768-89-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 91768-89-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,1,7,6 and 8 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 91768-89:
(7*9)+(6*1)+(5*7)+(4*6)+(3*8)+(2*8)+(1*9)=177
177 % 10 = 7
So 91768-89-7 is a valid CAS Registry Number.