4457-78-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 4457-78-7 includes 7 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 4 digits, 4,4,5 and 7 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 4457-78:
(6*4)+(5*4)+(4*5)+(3*7)+(2*7)+(1*8)=107
107 % 10 = 7
So 4457-78-7 is a valid CAS Registry Number.