99981-80-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99981-80-3 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 1 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 99981-80:
(7*9)+(6*9)+(5*9)+(4*8)+(3*1)+(2*8)+(1*0)=213
213 % 10 = 3
So 99981-80-3 is a valid CAS Registry Number.