20555-23-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20555-23-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,0,5,5 and 5 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 20555-23:
(7*2)+(6*0)+(5*5)+(4*5)+(3*5)+(2*2)+(1*3)=81
81 % 10 = 1
So 20555-23-1 is a valid CAS Registry Number.