49640-57-5 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 49640-57-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 4,9,6,4 and 0 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 49640-57:
(7*4)+(6*9)+(5*6)+(4*4)+(3*0)+(2*5)+(1*7)=145
145 % 10 = 5
So 49640-57-5 is a valid CAS Registry Number.