3-hydroxy-2-naphthoate salt

Amino-2-naphthoic acid has been prepared by heating 3-hydroxy-2-naphthoic acid with ammonia under pressure, in the presence of catalysts. These catalysts include zinc (or calcium) chloride 2 3 4 alone or with addition of aluminum chloride.5 Zinc oxide or carbonate and ammonium chloride,6, 7 8 or ferrous ammonium salts,9,10 have also been used. When sodium hydroxy-naphthoate is heated with 35 per cent ammonia at 260-280°, the... 

This carboxylation reaction is of importance mainly for the manufacture from 2-naphthol of P-oxynaphthoic acid (BON) acid, the parent acid of sodium 3-hydroxy-2-naphthoate (4-35). The carboxylation is achieved by heating the sodium salt of 2-naphthol under pressure in an atmosphere of carbon dioxide (Scheme 4.25). Under these conditions an equilibrium mixture of the naphthol and its carboxylated derivative is established, the mixture containing about 30% of the carboxylic acid. The desired product is extracted from the reaction mixture and the unchanged 2-naphthol is recycled. 

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]. 

C.l. Pigment Red 57 1 C.l. Pigment Red 57, calcium salt (1 1) Calcium 3-hydroxy-4-((4-methyl-2-sulph-onatophenyl)azo)-2-naphthoate CCRIS 4903 Cl 15850 1 (Ca salt) D C Red No. 7 EINECS 226-109-5 3-Hydroxy-4-((4-methyl-2-sulfophenyl)azo)-2-naphtti-alenecarboxylic acid, calcium salt Hydroxy-4-( 2-sulfo-p-tolyl)azo)-2-naphthaleneoarboxylic acid, calcium salt (1 1) Lithol rubin B ca 2-NapMhalenecarboxylic acid, 3-hydroxy-4-((4-methyl-2-sulfophenyljazo)-, calcium salt. 

CAS 6371-76-2 EINECS/ELINCS 228-899-7 Synonyms Calcium bis [3-hydroxy-4-(phenylazo)-2-naphthoate] 3-Hydroxy-4-(phenylazo)-2-naphthalenecarboxylic acid calcium salt (2 1) Pigment red 64 1 Classification Monoazo color Empirical C17H12N2O3 ViCa Toxicology TSCA listed Uses Colorant in cosmetics... 

CAS 5858-81-1 EINECS/ELINCS 227-497-9 Synonyms Disodium 3-hydroxy-4-[(4-methyl-2-sulfonatophenyl) azo]-2-naphthoate 3-Hydroxy-4-[(4-methyl-2-sulfophenyl) azo]-2-naphthalenecarboxylic acid disodium salt Pigment red 57 Classification Monoazo color Empirical Ci8Hi4N2Na20sS Formula C18H14N2O6S 2Na Toxicology TSCA listed Uses Colorant in cosmetics, pharmaceuticals See also D C Red No. 6... 

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