21447-89-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21447-89-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,4,4 and 7 respectively; the second part has 2 digits, 8 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 21447-89:
(7*2)+(6*1)+(5*4)+(4*4)+(3*7)+(2*8)+(1*9)=102
102 % 10 = 2
So 21447-89-2 is a valid CAS Registry Number.