72531-42-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 72531-42-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,2,5,3 and 1 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 72531-42:
(7*7)+(6*2)+(5*5)+(4*3)+(3*1)+(2*4)+(1*2)=111
111 % 10 = 1
So 72531-42-1 is a valid CAS Registry Number.