154-20-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 154-20-1 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 1,5 and 4 respectively; the second part has 2 digits, 2 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 154-20:
(5*1)+(4*5)+(3*4)+(2*2)+(1*0)=41
41 % 10 = 1
So 154-20-1 is a valid CAS Registry Number.