21392-44-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21392-44-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,3,9 and 2 respectively; the second part has 2 digits, 4 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 21392-44:
(7*2)+(6*1)+(5*3)+(4*9)+(3*2)+(2*4)+(1*4)=89
89 % 10 = 9
So 21392-44-9 is a valid CAS Registry Number.