23889-42-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 23889-42-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,8,8 and 9 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 23889-42:
(7*2)+(6*3)+(5*8)+(4*8)+(3*9)+(2*4)+(1*2)=141
141 % 10 = 1
So 23889-42-1 is a valid CAS Registry Number.