693807-91-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 693807-91-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,9,3,8,0 and 7 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 693807-91:
(8*6)+(7*9)+(6*3)+(5*8)+(4*0)+(3*7)+(2*9)+(1*1)=209
209 % 10 = 9
So 693807-91-9 is a valid CAS Registry Number.