1128-21-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1128-21-8 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,1,2 and 8 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 1128-21:
(6*1)+(5*1)+(4*2)+(3*8)+(2*2)+(1*1)=48
48 % 10 = 8
So 1128-21-8 is a valid CAS Registry Number.