Naphthyl-amine

Physical properties. Majority are liquids except p toluidine and 1- and 2-naphthylamine. All are colourless when pure, but rapidly darken on exposure to air and light. All are very sparingly soluble in water, but dissolve readily in dilute mineral acids (except the naphthyl-amines, which are only moderately soluble in adds). They form colourless crystalline salts e.g., CjHjNH2,HCl) which are soluble in water these aqueous solutions usually have an add reaction owing to hydrolysis, and give the reactions of both the amine and the acid from which they are derived. Addition of alkali to the acid solution liberates the amine. 

Various basic substances, such as aromatic amines (naphthyl-amines dissolve with difficulty in dil. HCl, diphenylamine only in cone. HCl, triphenylamine insoluble) nitro-anilines some amino-carboxylic acids. 

TEST Aniline 0- toluidine m-> toluidine P-. toluidine I- naphthyl- amine 2- naphthyl- amine mono- methyl- aniline diphenyl- amine dimethyl- aniline triphenyl- amine... 

Odors are measured by their intensity. The threshold value of one odor to another, however, can vary greatly. Detection threshold is the minimum physical intensity necessary for detection by a subject where the person is not required to identify the stimulus, but just detect the existence of the stimulus. Accordingly, threshold deterrninations are used to evaluate the effectiveness of different treatments and to estabflsh the level of odor control necessary to make a product acceptable (8). Concentration can also produce different odors for the same matenal. For example, indole (qv) in low concentrations has the smell of jasmine and a low threshold of perception. In high concentrations, it has a strong odor of feces and CX-naphthyl amine as well as a considerably higher threshold of perception. 

Oxidation of LLDPE starts at temperatures above 150°C. This reaction produces hydroxyl and carboxyl groups in polymer molecules as well as low molecular weight compounds such as water, aldehydes, ketones, and alcohols. Oxidation reactions can occur during LLDPE pelletization and processing to protect molten resins from oxygen attack during these operations, antioxidants (radical inhibitors) must be used. These antioxidants (qv) are added to LLDPE resins in concentrations of 0.1—0.5 wt %, and maybe naphthyl amines or phenylenediamines, substituted phenols, quinones, and alkyl phosphites (4), although inhibitors based on hindered phenols are preferred. 

Condensation of an o-nitrosophenol with an amine hydrochloride in acetic acid (10) Nile Blue [2381-85-3] is formed from the hydrochloride of 1-naphthyl amine. 

V-Alkyl and A/-aryl substituted naphthyl amines are also important, eg, letter acid derivatives, but are usually manufactured by the Bucherer reaction. 

The past experience of the dyestuff industry in its use of dye intermediates such as ( -naphthyl amine and benzidine (4), known human bladder carcinogens (334—343), have led to studies as to whether or not handlers of dyes are exposed to medical ha2ards such as cancer, dermatitis, and other disorders (344-360). 

The Bucherer carbazole synthesis " involves the treatment of a naphthyl alcohol (1 or 4) or a naphthyl amine (2 or 5) with a phenylhydrazine 3 in the presence of aqueous sodium bisulfite to afford, after acidic work-up, either a benzo[a]carbazole 4 or benzo[c]carbazole 6. 

When naphthyl amines e.g. 23) are used in the Bucherer carbazole synthesis, they are converted by the catalytic action of aqueous bisulfite into tetralonesulfonic acid derivative 13 by the Bucherer reaction. Addition of NaHSOs gives an enamine, which tautomerises to the imine 24 24 is hydrolysed to keto form 13 and subsequent Bucherer carbazole synthesis follows to afford the benzocarbazole product 20. ... 

Naphtyl, n. naphthyl, -amin, n. naphthylamine. -aminsulfosaure, /. naphthylaminesulfonic acid, -blsu, n. naphthyl blue. 

Suramin, a symmetrical, polysulfonated naphthyl-amine, inhibits a number of trypanosomal enzymes however, the importance of these effects on parasite killing is not clear. 

Dinitronaphthalene (Delta-dinitronaphtha-lenet 1,6-DNN). Crysts from acet ac, mp 166-67°, bp at 10mm 235°, 360° with decompn (Refs 2 31) CA Registry No 60746-5. It is prepd by the nitration of 2-nitronaphtha- ene with nitric ac/sulfuric ac in hot acet ac (Ref 21) by diazotization of 5-nitro-2-naphthyl-amine followed by treatment of the diazonium salt with Na cobaltinitrite, yield 40% (Ref 36) or by removal of the amino group from 1,6-dinitro-2-naphthylamine by diazotization followed by redn (Ref 17). The temp of expin is 492°(Refl7)... 

DNPh forms low mp additive compds with ammonia or amines (aniline, toluidine, naphthyl-amine, etc), which on intimate mixing with oxidants (AN, K nitrate, Na nitrate, K chlorate,... 

In an acetone extract from a neoprene/SBR hose compound, Lattimer et al. [92] distinguished dioctylph-thalate (m/z 390), di(r-octyl)diphenylamine (m/z 393), 1,3,5-tris(3,5-di-f-butyl-4-hydroxybenzyl)-isocyanurate m/z 783), hydrocarbon oil and a paraffin wax (numerous molecular ions in the m/z range of 200-500) by means of FD-MS. Since cross-linked rubbers are insoluble, more complex extraction procedures must be carried out (Chapter 2). The method of Dinsmore and Smith [257], or a modification thereof, is normally used. Mass spectrometry (and other analytical techniques) is then used to characterise the various rubber fractions. The mass-spectral identification of numerous antioxidants (hindered phenols and aromatic amines, e.g. phenyl-/ -naphthyl-amine, 6-dodecyl-2,2,4-trimethyl-l,2-dihydroquinoline, butylated bisphenol-A, HPPD, poly-TMDQ, di-(t-octyl)diphenylamine) in rubber extracts by means of direct probe EI-MS with programmed heating, has been reported [252]. The main problem reported consisted of the numerous ions arising from hydrocarbon oil in the recipe. In older work, mass spectrometry has been used to qualitatively identify volatile AOs in sheet samples of SBR and rubber-type vulcanisates after extraction of the polymer with acetone [51,246]. 

MMET Monomethylester chlorotin PBNA A-Phenyl-f -naphthyl amine... 

Retard degradation processes through y radiation. Phenyl- -naphthyl amine (PBN) is a commercial agent widely used in the rubber industry polyaniline (PAn) is also effective. 

Ethyl amine was estimated by the method of Citron et al. [140], aniline by the method of Norwitz [141], diphenylamine by the method of DeAtley [142] and naphthyl amine by the method of Pandey et al. [143]. 

Van den Berg [131] used this technique to determine nanomolar levels of nitrate in seawater. Samples of seawater from the Menai Straits were filtered and nitrite present reacted with sulfanilamide and naphthyl-amine at pH 2.5. The pH was then adjusted to 8.4 with borate buffer, the solution de-aerated, and then subjected to absorptive cathodic stripping voltammetry. The concentration of dye was linearly related to the height of the reduction peak in the range 0.3-200 nM nitrate. The optimal concentrations of sulfanilamide and naphthyl-amine were 2 mM and 0.1 mM, respectively, at pH 2.5. The standard deviation of a determination of 4 nM nitrite was 2%. The detection was 0.3 nM for an adsorption time of 60 sec. The sensitivity of the method in seawater was the same as in fresh water. 

In acetonitrile-dichloromethane 1 1 v/v solution, their absorption spectra are dominated by naphthalene absorption bands and they exhibit three types of emission bands, assigned to naphthyl localized excited states (/Wx = 337 nm), naphthyl excimers (Amax ca. 390 nm), and naphthyl-amine exciplexes (/lmax = 480 nm) (solid lines in Fig. 3). The tetraamine cyclam core undergoes only two protonation reactions, which not only prevent exciplex formation for electronic reasons but also cause strong nuclear rearrangements in the cyclam structure which affect excimer formation between the peripheral naphthyl units of the dendrimers. 

A. Matsuzaki, S. Nagakura, and K. Yoshihara, Interactions of /1-naphthol and -naphthyl-amine in their excited singlet states with triethylamine, Bull. Chem. Soc. Jpn. 47, 1152-1157 (1974). 

From photoreduction (> 280 nm) in diethylamine, low yields of 1-naphthyl-amine and the corresponding azo- and azoxy compounds have been obtained Photolysis (366 nm) in acidified 50% aqueous 2-propanol at varied HCl-concentrations results in remarkable enhancement of photoreduction compared to neutral 2-propanol. The highest disappearance quantum yield measured was 1.28 X 10 2 for 6 M HCl 4-chloro-l-naphthylamine is formed as main product 74.75). 

S5Tionyms AI3-02912 AIDS-18992 2-Aminonaphthalene BNA CCRIS 424 C.I. 37270 EINECS 202-080-4 Fast scarlet base B 2-Naphthalamine 2-Naphthalenainine P-Naphthyl-amine 6-Naphthylamine 2-Naphthylamine mustard NSC 4153 RCRA waste number U168 UN 1650 USAF CB-22. 

Lecorche-Jovinet Sensitivity Test. Test for the stability of proplnts contg NG. Any nitrous acid present is absorbed by diethyldiphenyl-urea to form ethylphenylnitrosamine, which can be detected by testing with os-naphthyl-amine-HCl... 

Pale crepe, 50 phenol-formaldehyde resin, 5 hexamethylene tetramine, 5 zinc oxide, 1 stearic acid, 1 phenyl-/ -naphthyl-amine, 0.7 Sontocure, 2.5 sulphur, 30 min at 140° C Methyl methacrylate 43 57 24 ... 

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