99643-49-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99643-49-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,6,4 and 3 respectively; the second part has 2 digits, 4 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 99643-49:
(7*9)+(6*9)+(5*6)+(4*4)+(3*3)+(2*4)+(1*9)=189
189 % 10 = 9
So 99643-49-9 is a valid CAS Registry Number.