23817-54-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 23817-54-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,8,1 and 7 respectively; the second part has 2 digits, 5 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 23817-54:
(7*2)+(6*3)+(5*8)+(4*1)+(3*7)+(2*5)+(1*4)=111
111 % 10 = 1
So 23817-54-1 is a valid CAS Registry Number.