66998-66-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 66998-66-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,9,9 and 8 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 66998-66:
(7*6)+(6*6)+(5*9)+(4*9)+(3*8)+(2*6)+(1*6)=201
201 % 10 = 1
So 66998-66-1 is a valid CAS Registry Number.