23893-57-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 23893-57-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,8,9 and 3 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 23893-57:
(7*2)+(6*3)+(5*8)+(4*9)+(3*3)+(2*5)+(1*7)=134
134 % 10 = 4
So 23893-57-4 is a valid CAS Registry Number.