Naphthol reds

Naphtholic oxygen Naphthol Maroons Naphthol Reds 1-naphthols Naphthols... 

Monoazo Pigments. In combination with other groups, the a2o linkage, —N=N—, imparts color to many dyes and pigments (see Azo Dyes). The simplest of these, ie, the Hansa yellows, toluidine reds, and naphthol reds, do not have the lightfastness and heat stabiUty required for plastics. Permanent YeUow FGL and Permanent Red 2B are stable enough for vinyls, polyethylene, polypropylene, and ceUulosics (11). Permanent Red 2B is available as the calcium, barium, or manganese salt. 

Pontacyl Carmine 2G (Acid Red 1, Amido Naphthol Red G, Azophloxine, l-acetamido-8-hydroxy-7-phenylazonaphthalene-3,7-disulfonic acid di-Na salt) [3734-67-6] M 510.4, Cl 18050, X.max 532nm. Salted out three times with sodium acetate, then repeatedly extracted with EtOH. See Solochrome Violet R on p. 352 in Chapter 4. [McGrew and Schneider 7 Am Chem Soc 72 2547 1950.]... 

Naphthol AS pigments, 9 425 Naphthol couplers, 19 252-253 in chromogenic chemistry, 19 251 a-Naphthol derivatives, 21 145 P-Naphthol derivatives, 21 145 Naphthol dyes, 9 182, 407 08 Naphthol reds/maroons, 19 437-438 Naphtholsulfonic acids, 9 356 N aphthopyrans... 

For Naphthol AS pigments (Naphthol Red pigments), the same chemistry is involved as with monoazo yellow pigments, except that coupling is carried out with arylides of 2-hydroxy-3-naphthoic acid. The reference compound, Naphtol AS is the anilide of 2-hydroxy-3-naphthoic acid ... 

Naphthol AS is the condensation product of p-hydroxynaphthoic acid and aniline Naphtol AS is the trade name of this product sold by Hoechst AG, Germany. Pigments that are known as Naphtol AS compounds in Germany are referred to in the USA as Naphthol Reds. 

Pigment Red 2 [6041-94-7] 12310 NaphtholAS (Naphthol Red) coupling diazotized 2,5-dichloroaniline with 2-hydroxy-3-naphthanilide... 

Palatine scarlet, xylidine ponceau. Victoria scarlet, lanafuchswe, sorbine red. Biebnch acid red. crystal scarlet fast red. croeaine scarlet, Biebnch scarlet, wool and cloth h reds, wool scarlet, acetyl red, amido naphthol red, enocarmme, enorubine, azo acid ° red. Guinea fast red, fast acid cochineal, etc S o to ff 8. Decolorised 1 Colour is not restored either by air or by persulphate Axo Class Boil with dihitc bichromate Ks j f If 18 p P srs >< 1 s > j-... 

Fat Red 7B, l-[(/)-butylphenyl)azo -2-naphthol, l- (/)-methoxyphenyl)azo -2-naphthol, l-[(z 7-methoxyphenyl)azo]-2-naphthol and l-[o-methoxyphenyl)-azo]-2-naphthol red test dyes were chromatographed on a Merck low-pressure column. Silica gel 60 was the stationary phase (40-63 (Xm) and 50% water-saturated dichloromethane was used as the mobile phase at a flow rate of 1 ml min. ... 

Naphthol red F5RK. See Pigment red 170 Naphthol red LF. See Pigment red 9 Naphthol rubine F6B. See Pigment red 184 7-(2H-Naphtho [1,2-d] lriazol-2-yl)-3-phenylcoumarin. See Cl fluorescent brightener 236... 

Synonyms Alkali resistant dark red Cl 12355 Cl pigment red 23 3-Flydroxy-4-[(2-methoxy-5-nitrophenyl) azo]-3 -nitro-2-naphthanilide 3-Flydroxy-4-((2-methoxy-5-nitrophenyl)azo)-N-(3-nitrophenyl)-2-naph-thalene carboxamide 1 -(2-Methoxy-5-nitrophenylazo)-2-hydroxy-3-(3-nitrophenylcarbamoyl) naphthalene 2-Naphthalenecarboxamide Naphthol red B Empirical C24FI17N5O7... 

Synonyms Cl 12475 Naphthol red F5RK Permanent red 5RK Classification Naphthol color Empirical C2 H22N,0,... 

Amido naphthol red G Azophloxin Azophloxine Cl 18050 Ext. D C Red No. 11 Food red 10 2,7-Naphthalenenedisulfonic acid, 5-(acetylamino)-4-hydroxy-3-(phenylazo)-, disodium salt Phloxine G Red 2G Classification Azobenzene Empiricai Ci8Hi5N3Na208S2 Properties M.w. 511.46 Toxicoiogy Mutagenic data TSCA listed Hazardous Decomp. Prods. Heated to decomp., emits toxic vapors of NOx and SOx Uses Dye for polyamide colorant in foods ... 

D C Red No. 2 Fast red FD C Red No. 2 Food red 2 Food red 9 2-Hydroxy-1,r-azonaphthalene-3,6,4-trisulfonic acid trisodium salt 3-Hydroxy-4-[(4-sulfo-1-naphthalenyl) azo]-2,7-naphthalenedisulfonic acid trisodium salt 3-Hydroxy-4-((4-sulfo-1 -naphthyl) azo)-2,7-naphthalenedisulfonic acid, trisodium salt Naphthol red Naphthylamine red... 

---