20556-22-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 20556-22-3 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 6 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 20556-22:
(7*2)+(6*0)+(5*5)+(4*5)+(3*6)+(2*2)+(1*2)=83
83 % 10 = 3
So 20556-22-3 is a valid CAS Registry Number.