23020-81-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 23020-81-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,0,2 and 0 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 23020-81:
(7*2)+(6*3)+(5*0)+(4*2)+(3*0)+(2*8)+(1*1)=57
57 % 10 = 7
So 23020-81-7 is a valid CAS Registry Number.