5691-00-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 5691-00-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 5,6,9 and 1 respectively; the second part has 2 digits, 0 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 5691-00:
(6*5)+(5*6)+(4*9)+(3*1)+(2*0)+(1*0)=99
99 % 10 = 9
So 5691-00-9 is a valid CAS Registry Number.