685117-91-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 685117-91-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,8,5,1,1 and 7 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 685117-91:
(8*6)+(7*8)+(6*5)+(5*1)+(4*1)+(3*7)+(2*9)+(1*1)=183
183 % 10 = 3
So 685117-91-3 is a valid CAS Registry Number.