21223-51-8 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21223-51-8 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,2,2 and 3 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 21223-51:
(7*2)+(6*1)+(5*2)+(4*2)+(3*3)+(2*5)+(1*1)=58
58 % 10 = 8
So 21223-51-8 is a valid CAS Registry Number.