3423-42-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 3423-42-5 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,4,2 and 3 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 3423-42:
(6*3)+(5*4)+(4*2)+(3*3)+(2*4)+(1*2)=65
65 % 10 = 5
So 3423-42-5 is a valid CAS Registry Number.