54639-71-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 54639-71-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,4,6,3 and 9 respectively; the second part has 2 digits, 7 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 54639-71:
(7*5)+(6*4)+(5*6)+(4*3)+(3*9)+(2*7)+(1*1)=143
143 % 10 = 3
So 54639-71-3 is a valid CAS Registry Number.