99809-44-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99809-44-6 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,8,0 and 9 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 99809-44:
(7*9)+(6*9)+(5*8)+(4*0)+(3*9)+(2*4)+(1*4)=196
196 % 10 = 6
So 99809-44-6 is a valid CAS Registry Number.