2- Hydroxy-1- -3-naphthoic acid

Hydroxy-2-naphthoic acid. (See also Beta-hydroxynaphthoic acid). 

Hydroxy-2-Naphthalcnccarboxylic Acid. 3-Hydroxy-2-naphthoic acid or p-oxynaphthoic acid (BON BONA Developer 8) (28) is the principal commercial product among the hydroxynaphthalenecarboxyUc acids. To produce BON, 2-naphthol is first transformed into sodium... 

Pigment Red 52, calcium salt [17852-99-2] 15860 BONA (Ca salt) coupling of dia2oti2ed 2-amino-4-methyl-5-chloroben2enesulfonic acid with 3-hydroxy-2-naphthoic acid, foUowed by salt formation... 

Naphthol AS Coupling Components. Naphthol AS components are the aryhdes of either o-hydroxyarylcarboxycHc acids or acylacetic acids. They are free of sulfo and carboxyl groups, but form salts with bases these salts dissolve in water to give colloidal solutions, which couple with diazo components to form colored pigments. The whole class derives from the anilide of 3-hydroxy-2-naphthoic acid [92-70-6] Naphthol AS (85) (Cl Azoic Coupling Component 2). 

Monoazo dyes such as Disperse Blue 11 (102) and Disperse Black 1 (103) are appHed to cellulose acetate as a dispersion and dyed in the usual way, then diazotized in situ and coupled in this instance, to 3-hydroxy-2-naphthoic acid forming the blue and black shades, respectively. 

Azoic dyeing of cellulosic fibres is a process that is used only to a small extent today. In this process, an azo pigment is formed by chemical reaction within the fibre. The cotton fibres are first impregnated with an appropriate coupling component such as the anilide of 3-hydroxy-2-naphthoic acid, 156, under aqueous alkaline conditions. The fibre is then treated with a solution of a stabilised diazonium salt, in which the... 

The agreement between the observed and predicted k values of aromatic acids was within 10%. The correlation coefficient was 0.954 (n = 32). An error of greater than 10% for 3-hydroxy-2-naphthoic acid and 2-hydroxybenzoic acid was attributed mainly to an error in their K.A values.25 The partition coefficient, logP, and dissociation constant, pKA, of analytes can be obtained by simple calculations and by computational chemical calculations, and thus the retention time can be predicted in reversed-phase liquid chromatography. 

Bephenium Bephenium, 3-hydroxy-2-naphthoat benzyldimethyl(2-phenoxyethyl) ammonia (38.1.37), is made by reacting the sodium salt of 3-hydroxy-2-naphthoic acid with benzyldimethyl(2-phenoxyethyl)ammonia chloride (38.1.36). This is in turn made from benzyl chloride and Af-(2-phenoxyethyl)dimethylamine (38.1.35), which is synthesized by reacting sodium phenolate with 2-dimethylaminoethylchloride [41,42]. 

Hydroxy-2-naphthoic acid see 3-naphthol-2-carboxylic acid. 

LltholRubine. Lithol Rubine (Pigment Red 57 [5281-04-9]), also referred to as 4B toner, is the calcium salt of diazotized 2-amino-5-methylbenzenesulfonic acid coupled with 3-hydroxy-2-naphthoic acid. It ranks high among organic pigments in production volume and use. 

The BON or BONA Reds and Maroons derive their name from /(-hydroxynaphthoic acid, also known as 3-hydroxy-2-naphthoic acid. BON is used as a general coupling component for the entire group with various dia/oi.i/ed airlines containing salt-forming groups. 

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