23405-34-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 23405-34-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,3,4,0 and 5 respectively; the second part has 2 digits, 3 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 23405-34:
(7*2)+(6*3)+(5*4)+(4*0)+(3*5)+(2*3)+(1*4)=77
77 % 10 = 7
So 23405-34-7 is a valid CAS Registry Number.