731815-57-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 731815-57-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 7,3,1,8,1 and 5 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 731815-57:
(8*7)+(7*3)+(6*1)+(5*8)+(4*1)+(3*5)+(2*5)+(1*7)=159
159 % 10 = 9
So 731815-57-9 is a valid CAS Registry Number.