21573-42-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21573-42-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,5,7 and 3 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 21573-42:
(7*2)+(6*1)+(5*5)+(4*7)+(3*3)+(2*4)+(1*2)=92
92 % 10 = 2
So 21573-42-2 is a valid CAS Registry Number.