naphthol

(redirected from Napthol)
Also found in: Dictionary, Thesaurus, Encyclopedia.

naphthol

 [naf´thol]
a phenol occurring in coal tar in two forms: α- or 1-naphthol and β- or 2-naphthol. It is used in dyes, insecticides, and pharmaceutical compounds. If excessive amounts are ingested, poisoning may result, characterized by anemia, jaundice, convulsions, and coma.

naph·thol

(naf'thol),
A hydroxynaphthalene, occurring in two forms: α-naphthol, a dye intermediate used in cytochemistry for l-arginine localization; and β-naphthol, also known as isonaphthol, used as an anthelmintic and antiseptic. Both forms are also used in the manufacture of dyes, organic chemicals, and rubber products.
Synonym(s): naphthalenol

naphthol

Toxicology A white crystalline phenol derivative intermediate in the synthesis of multiple compounds including pharmaceuticals Toxicity Abdominal pain, glomerulonephritis, convulsions, circulatory collapse, skin pigmentation
References in periodicals archive ?
Types of pigments: Blues (phthalos, triarylcarbonium), Greens (phthalo), Reds (napthol AS I & II, beta-naph thols, BONA lakes, triarylcarbonium, quinaphthalones, isoindolines, benz imidazolones), Yellow and oranges
Blues (phthalo, ultramarine, victoria); Greens (phthalo); Reds (napthol, toluidine, red 2B, quinacridone, rhodamine, alizorine, red lake C, lithol rubine); Yellow (beazimidozol, hansa, diorylide).
Blue pigments (indanthrone, phthalocyanine blue); Green (phthalocyanine green); Red pigments (arylide red/maroon, BON red/maroon, lithol rubine, metallized azo red, napthol, perylene red/maroon, quinacridone red/violet, red lake C, toluidine red); Yellow and orange pigments (diarylide orange/yellow toner, hansa yellow, metallized azo yellow, orthonitraniline dinitraniline).
Black pigments (effect blacks-graphite); Blue pigments; (phthalo blues, indanthrone blues, quinacridone violets, carbozole violets); Green pigments (phthalo green); Red pigments (azo 2B toners, red lake C, rubines, quinacridones, DPP, QA/DPP solid solutions, azo condensation, napthols); Yellow and orange pigments (bismuth vanadate, arylamide, isoindolinone, azo condensation, azo salt, DPP, diarylide, anthraquinone, dianisidine)
HPPs encompass a wide variety of pigments, including specialty phthalocyanine (blue and green), indanthrone, quinacridone, perylene, DPP, specialty napthol, carbazole violet, benzimidazolone, azo condensations, metal complex pigments and isoindolinone.
This resulted in a rise in the price for naphthalene, which is the building block for tobias acid, beta napthol and BONA.
Comments: 1184 Napthol Red 184 has a bluish red hue and offers very good lightfastness and superior chemical resistance for use in paper coatings and especially for use as a process red in water flexo inks and solvent inks.
Tenders are invited for Cloth Cotton Pugree Napthol Red Mull 81 Cms Wide Mill Made In 21 Meters And Above And Below 50 Meters Multiples Of 4-5 Meters To Is Specn, 7119/1973 Reaffirmed With Relexation Of Parameters Inches Colour Fastness To Washing 3 Or Better, Inches Colour Fastness To Rubbing Both Dry And Wet 3 Or Better Inches And Fabric Of Variety No.1 Inches
is a medium shade high-performance napthol used for ink and paint applications, and is transparent grade.
* 13-3722 Permanent Rubine F8B P/C (PR 269 Napthol AS)
Organic pigments include phthalo blues and greens, 2B red, napthols, Red Lake C, and carbazole violet.
Primaries are usually p-phenylenediamines or p-aminophenols while couplers are resorcinols, m-aminophenols, m-phenylenediamines, or napthols. Want a nice shade of blue hair?