549505-81-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 549505-81-9 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,4,9,5,0 and 5 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 549505-81:
(8*5)+(7*4)+(6*9)+(5*5)+(4*0)+(3*5)+(2*8)+(1*1)=179
179 % 10 = 9
So 549505-81-9 is a valid CAS Registry Number.