57717-78-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 57717-78-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,7,7,1 and 7 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 57717-78:
(7*5)+(6*7)+(5*7)+(4*1)+(3*7)+(2*7)+(1*8)=159
159 % 10 = 9
So 57717-78-9 is a valid CAS Registry Number.