The 4-hydroxylation of aniline hydrochloride
results in the formation of 4-aminophenol, which is determined spectorphotometrically by indophenol reaction.
Polyaniline was prepared by the oxidation of 0.2 M aniline hydrochloride
(Fluka, Switzerland) with 0.25 M ammonium peroxydisulfate (APS) (Lach-Ner, Czech Republic) in water  at room temperature.
It can be seen that the bands of aniline dominate the spectra for products without ageing and those characterized after 3 and 7 days of ageing: the band at 1384 [cm.sup.-1] is attributed to C-N stretch of aniline hydrochloride
and the bands at 3784 [cm.sup.-1] and 3433 [cm.sup.-1] are attributed to N-H stretching vibration.
Analysis of the effects of exposure to other derivatives of aniline leads to a conclusion that the subchronic toxicity of aniline hydrochloride
in rats significantly decreases erythrocyte counts and hemoglobin levels during 30 days of treatment .
Ti[O.sub.2]/polyaniline (Ti[O.sub.2]/PANi) was synthesized using Ti[O.sub.2] (Sigma Aldrich, 99.9% purity) and aniline hydrochloride
(Sigma Aldrich, 99.95%).
Polyaniline was synthesized by chemical polymerization of aniline hydrochloride
using ammonium peroxydisulfate as the oxidizing agent.
Process for Producingphenylpiperazines by Cyclocndensation of Diethanolamine with Aniline Hydrochloride
:HU Patent, 61,737[P].1993 - 03 - 01.
In the first step of Scheme 3, first drop of acetaldehyde reacts with aniline hydrochloride
to give the intermediate (a).
[4.] Aniline and aniline hydrochloride
. IARC Monogr Eval Carcinog Risk Chem Hum 1982;27:39-61.
. With the current public concern over carcinogenicity of chemicals, I believe it is important not to add to the misinformation.