99820-21-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99820-21-0 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,8,2 and 0 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 99820-21:
(7*9)+(6*9)+(5*8)+(4*2)+(3*0)+(2*2)+(1*1)=170
170 % 10 = 0
So 99820-21-0 is a valid CAS Registry Number.