81562-21-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81562-21-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,5,6 and 2 respectively; the second part has 2 digits, 2 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 81562-21:
(7*8)+(6*1)+(5*5)+(4*6)+(3*2)+(2*2)+(1*1)=122
122 % 10 = 2
So 81562-21-2 is a valid CAS Registry Number.