21432-59-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 21432-59-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,1,4,3 and 2 respectively; the second part has 2 digits, 5 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 21432-59:
(7*2)+(6*1)+(5*4)+(4*3)+(3*2)+(2*5)+(1*9)=77
77 % 10 = 7
So 21432-59-7 is a valid CAS Registry Number.