78439-57-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 78439-57-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,8,4,3 and 9 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 78439-57:
(7*7)+(6*8)+(5*4)+(4*3)+(3*9)+(2*5)+(1*7)=173
173 % 10 = 3
So 78439-57-3 is a valid CAS Registry Number.