1423-64-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 1423-64-9 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 1,4,2 and 3 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 1423-64:
(6*1)+(5*4)+(4*2)+(3*3)+(2*6)+(1*4)=59
59 % 10 = 9
So 1423-64-9 is a valid CAS Registry Number.