66661-88-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 66661-88-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 6,6,6,6 and 1 respectively; the second part has 2 digits, 8 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 66661-88:
(7*6)+(6*6)+(5*6)+(4*6)+(3*1)+(2*8)+(1*8)=159
159 % 10 = 9
So 66661-88-9 is a valid CAS Registry Number.