23040-98-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 23040-98-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,0,4 and 0 respectively; the second part has 2 digits, 9 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 23040-98:
(7*2)+(6*3)+(5*0)+(4*4)+(3*0)+(2*9)+(1*8)=74
74 % 10 = 4
So 23040-98-4 is a valid CAS Registry Number.