99891-87-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99891-87-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,8,9 and 1 respectively; the second part has 2 digits, 8 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 99891-87:
(7*9)+(6*9)+(5*8)+(4*9)+(3*1)+(2*8)+(1*7)=219
219 % 10 = 9
So 99891-87-9 is a valid CAS Registry Number.