1801-22-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1801-22-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,8,0 and 1 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1801-22:
(6*1)+(5*8)+(4*0)+(3*1)+(2*2)+(1*2)=55
55 % 10 = 5
So 1801-22-5 is a valid CAS Registry Number.