21123-84-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21123-84-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,1,2 and 3 respectively; the second part has 2 digits, 8 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 21123-84:
(7*2)+(6*1)+(5*1)+(4*2)+(3*3)+(2*8)+(1*4)=62
62 % 10 = 2
So 21123-84-2 is a valid CAS Registry Number.