99661-13-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99661-13-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,6,6 and 1 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 99661-13:
(7*9)+(6*9)+(5*6)+(4*6)+(3*1)+(2*1)+(1*3)=179
179 % 10 = 9
So 99661-13-9 is a valid CAS Registry Number.