511-81-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 511-81-9 includes 6 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 3 digits, 5,1 and 1 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 511-81:
(5*5)+(4*1)+(3*1)+(2*8)+(1*1)=49
49 % 10 = 9
So 511-81-9 is a valid CAS Registry Number.