206998-23-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 206998-23-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,6,9,9 and 8 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 206998-23:
(8*2)+(7*0)+(6*6)+(5*9)+(4*9)+(3*8)+(2*2)+(1*3)=164
164 % 10 = 4
So 206998-23-4 is a valid CAS Registry Number.