109798-23-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 109798-23-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,0,9,7,9 and 8 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 109798-23:
(8*1)+(7*0)+(6*9)+(5*7)+(4*9)+(3*8)+(2*2)+(1*3)=164
164 % 10 = 4
So 109798-23-4 is a valid CAS Registry Number.