99421-51-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99421-51-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,4,2 and 1 respectively; the second part has 2 digits, 5 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 99421-51:
(7*9)+(6*9)+(5*4)+(4*2)+(3*1)+(2*5)+(1*1)=159
159 % 10 = 9
So 99421-51-9 is a valid CAS Registry Number.