509323-81-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 509323-81-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 5,0,9,3,2 and 3 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 509323-81:
(8*5)+(7*0)+(6*9)+(5*3)+(4*2)+(3*3)+(2*8)+(1*1)=143
143 % 10 = 3
So 509323-81-3 is a valid CAS Registry Number.