99172-89-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99172-89-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,1,7 and 2 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 99172-89:
(7*9)+(6*9)+(5*1)+(4*7)+(3*2)+(2*8)+(1*9)=181
181 % 10 = 1
So 99172-89-1 is a valid CAS Registry Number.