54639-69-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 54639-69-9 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, 6 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 54639-69:
(7*5)+(6*4)+(5*6)+(4*3)+(3*9)+(2*6)+(1*9)=149
149 % 10 = 9
So 54639-69-9 is a valid CAS Registry Number.