23923-18-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 23923-18-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,9,2 and 3 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 23923-18:
(7*2)+(6*3)+(5*9)+(4*2)+(3*3)+(2*1)+(1*8)=104
104 % 10 = 4
So 23923-18-4 is a valid CAS Registry Number.