98221-23-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 98221-23-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,8,2,2 and 1 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 98221-23:
(7*9)+(6*8)+(5*2)+(4*2)+(3*1)+(2*2)+(1*3)=139
139 % 10 = 9
So 98221-23-9 is a valid CAS Registry Number.