81340-18-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 81340-18-3 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,1,3,4 and 0 respectively; the second part has 2 digits, 1 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 81340-18:
(7*8)+(6*1)+(5*3)+(4*4)+(3*0)+(2*1)+(1*8)=103
103 % 10 = 3
So 81340-18-3 is a valid CAS Registry Number.