54646-56-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 54646-56-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 5,4,6,4 and 6 respectively; the second part has 2 digits, 5 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 54646-56:
(7*5)+(6*4)+(5*6)+(4*4)+(3*6)+(2*5)+(1*6)=139
139 % 10 = 9
So 54646-56-9 is a valid CAS Registry Number.