naphthol


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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 (phthalo); Greens (phthalo); Reds (naphthol, quinacridone, disazo condensation, DPP, lithol red, perylene, benzimidazolone, lake red); Yellow and oranges (hansa, diarylide, monoazo, diazo condensation, isoindoline, benzimidazaolone)
Despite its reactions with other compounds, the redox reaction of this oxidant with naphthol green B is scanty.
The spectrophotometric titrations of triazole ligand 1 carrying naphthol group with Cu2+ Co2+ Cd2+ Ni2+ and Pb2+ cations point outthe complexation properties of the ligand in aqueous solutions and methanol:water media (1:1) by using Buschmann and Valeur's methods respectively.
The solid (514 mg) was recrystallised from ethyl acetate to give Naphthol glucoside as light brown plates (480 mg), molecular formula found ([C.sub.16][H.sub.18][O.sub.7]), mp 216-218 [degrees]C (lit.4, 217 [degrees]C) m/z 222 [M.sup.+], [v.sub.max] (KBr) [cm.sup.-1]; 3605, 3005, 2890, 1600, and 1450.
As with the benzimidazolones, there are two main classes of these pigments, an arylide yellow type and a Naphthol AS type.
Thereafter these were again incubated for 2 h at room temperature with ALP substrate solution (freshly prepared 100 mM Tris-maleate buffer, pH 9.2, containing 0.2 mg/ml naphthol AS-MX phosphate and 0.4 mg/ml Fast Red TR).
The report concluded that all the samples such as excavated waste- lime sludge, naphthol tar, reactor residue, semi- processed pesticide and sevin tar were found to be having very low mammalian toxicity," said Bhopal gas tragedy relief and rehabilitation minister Babulal Gaur.
M9750-12; dilution 1:25), and an immunoalkaline phosphatase with naphthol fast red chromogenic substrate.
Naphthol was formed as a result of an enzymatic reduction of naphthyl phosphate in the presence of an alkaline phosphatase label, using a diethanolamine instead of a bicarbonate buffer.
Classical grades are workhorse yellow, orange, and red pigments, such as azo salts and diarylide and naphthol compounds.
The technologies evaluated at Florida Wood Recycling include the use of PAN (pyridylazo and naphthol) stain that, when applied to wood, causes a distinct color change if the wood is treated with copper.
* Naphthol blue black (dye content [greater than or equal to] 85%)