Naphthylamine black

Naphthol black, naphthylamine black, nerol, amido black, amine black, azo acid black, azo merino black, palatine black, supramine black, sulphoncyanine black, sulphon black. Biebrich patent black, cresol black, Guinea black, etc. The cotton remains white Acid Dyestuff. On boiling with Hydrosulphite A X, the colour is permanently discharged. 

Technical Observations. The preparation of naphthylamine black D can be done in various ways. Many industrial chemists prefer to salt out the diazo compound of the monoazo dye and filter it off to purify it. This has the advantage of removing unchanged o-naphthylamine and preventing the formation, in the final product, of the insoluble dye (wliich is not fast to rubbing) ... 

Naphthol yellow S, 151 Naphthsultone, 187, 217 a-Naphthylamine, 176 diazotization, 245, 260 technical observations, 178 y3-Naphthylamine, 54, 203 diazotization, 246 Naphthylamine black D, 277 l-Naphthylamine-2,4-disulfonic add, 80, 85, 178... 

Phloroglucinol is Hsted in the Colourindex as Cl Developer 19. It is particularly valuable in the dyeing of acetate fiber but also has been used as a coupler for azoic colors in viscose, Odon, cotton (qv), rayon, or nylon fibers, or in union fabrics containing these fibers (157). For example, cellulose acetate fabric is treated with an aromatic amine such as (9-dianisidine or a disperse dye such as A-hydroxyphenylazo-2-naphthylamine and the amine diazotizes on the fiber the fabric is then rinsed, freed of excess nitrite, and the azo color is developed in a phloroglucinol bath at pH 5—7. Depending on the diazo precursor used, intense blue to jet-black shades can be obtained with excellent light-, bleach-, and mbfastness. 

Solutions in contact with polyvinyl chloride can become contaminated with trace amounts of lead, titanium, tin, zinc, iron, magnesium or cadmium from additives used in the manufacture and moulding of PVC. V-Phenyl-2-naphthylamine is a contaminant of solvents and biological materials that have been in contact with black rubber or neoprene (in which it is used as an antioxidant). Although it was only an artefact of the separation procedure it has been isolated as an apparent component of vitamin K preparations, extracts of plant lipids, algae, livers, butter, eye tissue and kidney tissue [Brown Chem Br 3 524 1967]. 

Amongst heat stabilisers are copper salts, phosphoric acid esters,phenyl-3-naphthylamine, mercaptobenzothiazole and mercaptobenzimidazole. Of these, copper salts in conjunction with halides have been found particularly effective, and some automotive specifications require the use of copper for heat stabilisation. Light stabilisers include carbon black and various phenolic materials. 

Smoked sheet, 40 lamp black, 1 phenyl-/ -naphthylamine, 3.5 dicumyl peroxide 50 min at 140° C Methyl methacrylate 52 — 96 96... 

When 2 ps of thismixture were milled for 3 hours with 100 psof black powder consisting of KNOj 75, alder charcoal 17 and sulfur 8%. the resulting product burned in fuses at the rate of 250-300 sec/yd (Ref 1), whereas ordinary fuse powder burns at the rate of 120 sec/yd (Ref 2). This aldoi-naphthylamine condensation product was proposed as an ingredient of slow burning fuse powders... 

C. I. Direct Black 51, 27720 [3442-21-5] (13) is produced by coupling a mixture of diazotized 3- and 5-aminosalicylic acid to 1-naphthylamine and subsequent alkaline coupling to y acid. 

The most important dyes of the type D->M->K are black and navy blue wool dyes, which contain as the middle component M chiefly 1-naphthylamine or 1-naphthylamine-7-sulfonic acid and as the coupling component K A-phenyl peri acid (A-phe ny 1 a m i n o n a p h th a 1 c n c - 8 - s u 1 fo n i c acid), A-tolyl peri acid, and naphthol or 1-naphthylamine derivatives. Examples of these high-yield and very wash- and lightfast dyes are C.I. Acid Black 24, 26370 (see Section 3.9.3), which is manufactured by coupling diazotized 1-naphthylamine-5-sulfonic acid to 1-naphthylamine, further diazotization of the aminomonoazo dye, and coupling to iV-phenylperi acid and C.I. Acid Blue 113, 26360 [3351-05-1] (20). This blue dye is very important in the dyeing of wool and polyamide. 

Suitable coupling components are acetoacetanilides for preparing yellow, pyrazolones for red, naphthols for blue and black, naphthylamines for green, and phenols for brown chromium and cobalt complex dyes. A combination of aceto-... 

The numerous experiments which led to the formation of dyes at the anode, when aniline, toluidine, methylaniline,. diphenylamine, nethyldiphenylamine and naphthylamine or their salts were electrolyzed, have, however, not been scientifically investigated and, hence, still remain unsolved. The same holds true of Goppelsroder investigations concerning the oxidation of phenol and anthraquinone. The most important discovery is the fact that aniline salts smoothly yield aniline black at the anode the naphthylamine salts give naphtliylamine-violet.1... 

Epsilon add, see 1-Naphthylamine-3,8-disulfonic add Erika red dyes, 335 Elriochrome azurol. 111, 155 Eriochrome black A and T, 202 Eriochrome blue-blade R, 202 Eriodirome flavine A, 295 Eriochrome red B, 265 Erioglaudne, 301 Erioviridine B, 301 Ethylbeni laniline, 134 Ethylbenzylanilinesulfonic add, 136, 305... 

Trinitro-2-aminonaphthalene or 1,6,8-Trinitro-2-naphthylairiine. Yel ndls turning, black at ca 266°, decomp ca 300°(Ref 3) and defgr at higher temps(Ref 2). Was first prepd by Staedel by heating the ethyl ether of l,6,8 trinitro-j3-naphthylamine with ale NH, in a Sealed tub,e at 50°. Other methods of prepn are listed in Refs 1,3 4... 

The combination of diazoazobenzenedisulphonic acid with paratolyl-/8-naphthylamine is known as Wool-Black. 

Diazoazonaphthalenesulphonic acid, obtained by combination of y8-naphthylaminesulphonic acid and a-naphthylamine, reacts with naphtholsulphonic acids, producing deep blue dyestuffs. One of these comes into commerce as Blue-black or Azo-black, and dyes wool a shade similar to that with nigrosine [68]. 

Jet-Black R Benzenedisulphonic acid azo-a-naphthylamine. /3-toluenesulphonic acid azo-a-naphthylamine. Salicylic acid azo-a-naphthylamine. N aphth alenedisulphonic acid azo-a-naphthyla-mine. Amidoazonaphthalene-disulphonic acid. Phenyl-a-naphthylamine. j3-naphthol-/3-sulphonic acid. a-naphthol-a-sulphouic acid. a-naphthylamine. j3-naptholdisulphonic acid... 

Cotton is dyed in a bath containing Glauber s salt and a little soap or soda, and the shades produced vary from dark blue to bluish black, about 6 per cent, of dyestuff being necessary to produce a maximum effect. The diazotising is effected by a bath of sodium nitrite acidified with hydrochloric acid. The developing-bath varies according to the shade required. Resorcin, y8-naphthol, and phenylenediaminc produce blacks of various shades blues are obtained with naphthylamine ether and mixtures of these developers produce blacks of every conceivable shade. 

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