18991-05-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 18991-05-4 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,9,9 and 1 respectively; the second part has 2 digits, 0 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 18991-05:
(7*1)+(6*8)+(5*9)+(4*9)+(3*1)+(2*0)+(1*5)=144
144 % 10 = 4
So 18991-05-4 is a valid CAS Registry Number.
InChI:InChI=1/2C6H6O.Cd/c2*7-6-4-2-1-3-5-6;/h2*1-5,7H;/q;;+2/p-2