221128-30-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 221128-30-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,1,2 and 8 respectively; the second part has 2 digits, 3 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 221128-30:
(8*2)+(7*2)+(6*1)+(5*1)+(4*2)+(3*8)+(2*3)+(1*0)=79
79 % 10 = 9
So 221128-30-9 is a valid CAS Registry Number.