99809-29-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 99809-29-7 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 9,9,8,0 and 9 respectively; the second part has 2 digits, 2 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 99809-29:
(7*9)+(6*9)+(5*8)+(4*0)+(3*9)+(2*2)+(1*9)=197
197 % 10 = 7
So 99809-29-7 is a valid CAS Registry Number.
99809-29-7Relevant academic research and scientific papers
The pKa of Areneselenenic Acids
Kang, Sang-Ihn,Kice, John L.
, p. 287 - 290 (2007/10/02)
The pKa's of o-nitrobenzeneselenenic acid (1a) and three 4-substituted-2-nitrobenzeneselenenic acids (1b-d) heve been determined at 25 deg C in water.A Hammett plot of the pKa's gives a ρ value for the ionization of ArSeOH (eq 3) of
