23181-78-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 23181-78-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,1,8 and 1 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 23181-78:
(7*2)+(6*3)+(5*1)+(4*8)+(3*1)+(2*7)+(1*8)=94
94 % 10 = 4
So 23181-78-4 is a valid CAS Registry Number.