731-09-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 731-09-9 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 7,3 and 1 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 731-09:
(5*7)+(4*3)+(3*1)+(2*0)+(1*9)=59
59 % 10 = 9
So 731-09-9 is a valid CAS Registry Number.