21243-22-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21243-22-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,2,4 and 3 respectively; the second part has 2 digits, 2 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 21243-22:
(7*2)+(6*1)+(5*2)+(4*4)+(3*3)+(2*2)+(1*2)=61
61 % 10 = 1
So 21243-22-1 is a valid CAS Registry Number.