99987-22-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99987-22-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,9,8 and 7 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 99987-22:
(7*9)+(6*9)+(5*9)+(4*8)+(3*7)+(2*2)+(1*2)=221
221 % 10 = 1
So 99987-22-1 is a valid CAS Registry Number.