40731-23-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 40731-23-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,0,7,3 and 1 respectively; the second part has 2 digits, 2 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 40731-23:
(7*4)+(6*0)+(5*7)+(4*3)+(3*1)+(2*2)+(1*3)=85
85 % 10 = 5
So 40731-23-5 is a valid CAS Registry Number.