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Phenols & Naphthols

Phenols, naphthols, binaphthols and nitroso naphthols for chiral ligands, analytical reagents, dyes, antioxidants and polymer chemistry.
189 products6 in stockCOA + SDS with every lot
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GridList
(R,S)-Equol
CAS
94105-90-5
Formula
C15H14O3
MW
242.27 g/mol
ZX-042800

Phenols and naphthols carry an acidic hydroxyl group on an aromatic ring, which makes them useful as nucleophiles, ligands, antioxidants and dye couplers. This sub-category spans simple phenols, naphthols and complex polyphenols. Examples are 1,1′-Bi-2-naphthol (BINOL), the parent of many chiral ligands, 1-Naphthol in standard and GR grades, 1-Nitroso-2-naphthol used for cobalt determination, 1,5-Dihydroxynaphthalene and (−)-Catechin from green tea.

Phenols oxidise in air and light, often turning pink or brown, so colour is a quick quality check. Analytical users need GR grades with low background for colorimetric tests. For BINOL, racemic and enantiopure forms serve different purposes, with the single enantiomers used in asymmetric catalysis and the racemate in materials and resolution studies.

Products are packed in amber bottles or opaque drums and stored cool and dry. Each lot comes with a COA and SDS. Gram packs suit research and analysis, while larger quantities can be quoted for dye and polymer use.

Phenols & Naphthols: questions buyers ask

Why is BINOL so widely used in asymmetric catalysis?
BINOL has axial chirality from hindered rotation between its two naphthalene rings, giving a stable, well-defined chiral environment. Its hydroxyl groups bind metals such as titanium, aluminium and lanthanides, and it can be converted into phosphoric acids and phosphoramidites. These derivatives catalyse a wide range of enantioselective reactions.
How is 1-nitroso-2-naphthol used in analysis?
1-Nitroso-2-naphthol forms an intensely coloured, insoluble chelate with cobalt, and also reacts with iron and palladium. It is used for gravimetric and spectrophotometric cobalt determination and for separating cobalt from nickel. The GR grade gives lower blanks for quantitative work.
Why do phenols change colour during storage?
Phenols oxidise in air and light to quinones and coupled products, which are strongly coloured even at trace levels. Moisture and metal traces speed this up. Store phenols in tightly sealed, light-resistant containers in a cool place, and purify by recrystallisation or sublimation if colour matters for your use.

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