51691-05-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 51691-05-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,1,6,9 and 1 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 51691-05:
(7*5)+(6*1)+(5*6)+(4*9)+(3*1)+(2*0)+(1*5)=115
115 % 10 = 5
So 51691-05-5 is a valid CAS Registry Number.