3998-23-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 3998-23-0 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 3,9,9 and 8 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 3998-23:
(6*3)+(5*9)+(4*9)+(3*8)+(2*2)+(1*3)=130
130 % 10 = 0
So 3998-23-0 is a valid CAS Registry Number.