Naphthols


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Naphthols

 

hydroxynaphthalenes, naphthalene derivatives of the general formula C10H8n(OH)a. The commercially valuable forms are α and β-naphthols and 1,5-, 1,8-, 2,3-, and 2,7-dihydroxynaphthalenes; the latter occur as colorless crystalline solids that are moderately soluble in water but insoluble in weak acids. Naphthols and their derivatives (mainly sulfonic acids) are used in the manufacture of dyes; β-naphthol methyl ether (yara-yara) and β-naphthol ethyl ether (neroli oil) are used in cosmetics manufacture for the preparation of soap perfumes. The largest single use of β-naphthol is in the manufacture of phenyl-β-naphthylamine (a stabilizing agent for natural and synthetic rubber).

References in periodicals archive ?
When DBE is 4, 7 or 9, among these compounds, probably phenols, naphthols and fluorenols, respectively, predominate.
Based on the results of GC-MS analysis, monohydric phenols, such as phenols, indanols, naphthols, phenylphenols, fluorenols and phenanthrenols, were identified in the two oils.
Using quantitative measures, we investigated the contributions of dermal and inhalation exposure to JP-8 to urinary naphthols levels.
Types of pigments: Blacks (carbon black, graphite), Blues (indantrone blue, phthalocyanine blue) Corrision inhibiting (zinc flake, zinc paste), Greens (phthalocyanine green), Iron oxide pigments (black iron oxide, red/brown iron oxide -synthetic), Metallic pigments (aluminum paste, aluminum powder, water borne aluminum, stain resistant aluminum, gold bronze powders), Reds (bon red/maroon; lithol rubine; pigment scarlet naphthol, arylide red and maroon; perylene red/violet/scarlet; red lake c; quinacridone red/maroon/violet), Specialty pigments (high performance; pearlescent), Yellow and oranges (diarylide orange toner; diarylide yellow toner; hansa yellow; metallized azo yellow)
Although recent reports have suggested that the naphthols might be useful biomarkers of exposure to polycyclic aromatic hydrocarbons (naphthalene is the simplest such compound; Bouchard et al.
A recognized leader in the supply of Diarylide yellows, Naphthol reds, 2B reds, Alkali blue and Carbazole Violets, we offer special grades of pigment for maximum transparency and gloss for packaging inks.
Types of pigments: Blacks (Carbon Black Dispersions); Blues (Indanthrone blue, Phthalocyanine Blue); Corrosion inhibiting (Zinc Flake, Zinc Paste); Greens (Phthalocyanine green); Metallic Pigments (Aluminum paste, Aluminum powder, Waterborne Aluminum, Stain resistant Aluminum, GoldBronze powders); Reds (Bon Red/Maroon, Lithol Rubine, Naphthol, Perylene Red, Perylene Maroon, Perylene Scarlet, Perylene Violet, Quinacridone Maroon, Quinacridone Red, Quinacridone Scarlet, Diketo-pyrrolo-pyrrole Red, Dioxazine Violet, Toluidine Red); Yellows and Oranges (Diarylide Yellow, Diarylide Orange, Hansa Yellow, Azo Yellow, Isoindoline Yellow, Benzimidazalone Yellow, Benzimidazalone Orange, Perinone Orange)
Pigments Offered: Blacks (carbon black); Blues (phthalo, ultramarine, milori); Corrosion Inhibiting; Greens (phthalo, chromium oxide); Iron Oxide Pigments (micronized); Metallic Pigments (aluminum); Reds (quinacridone, naphthol, DPP, toluidine); Yellows and Oranges (benzimidazolone, azo, isoindoline); Whites (Ti[O.
Pigments Offered: Dispersions (aqueous, non-aqueous); Blacks (carbon black); Blues (phthalocyanine); Greens (phthalocyanine); Iron Oxide Pigments (yellow iron oxide); Reds (lithol rubine, metallized azo red, naphthol red, perylene red, quinacridone red, quinacridone violet, red lake, toluidine red); Yellows and Oranges (diarylide orange, diarylide yellow, hansa yellow, metallized yellow, orthonitraniline orange, dinitraniline orange)
Pigments Offered: Blacks (carbon black); Blues (phthalo, ultramarine, milori); Corrosion Inhibiting (zinc and strontium based); Greens (phthalo, chromium oxide); Iron Oxide Pigments; Metallic Pigments (aluminum); Reds (metal salt azo, naphthol, DPP, quinacidone, rhodamine); Specialty Pigments (high performance pigments); Yellows and Oranges (diarylide, hansa, benz-imidazolone, lead chromate, moly orange); Whites (Ti[O.
Also naphthol red, RT172D and RT170D (PR170s) with bright masstone colorshade for PE and PP; and calcium precipitated monoazo yellows, YT362D (PY62) and YT369D (PY169) for polyolefins and styrenics.