4239-23-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 4239-23-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,2,3 and 9 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 4239-23:
(6*4)+(5*2)+(4*3)+(3*9)+(2*2)+(1*3)=80
80 % 10 = 0
So 4239-23-0 is a valid CAS Registry Number.