Description

1-Nitroso-2-Naphthol is an important organic chemical intermediate and analytical reagent. This compound matters for its unique chelating properties and its role as a precursor in the synthesis of dyes, pigments, and other specialty chemicals. It is primarily needed by manufacturers in the chemical, pharmaceutical, and analytical reagent industries.

Application

• Analytical Chemistry: Used as a sensitive and selective colorimetric reagent for the detection and gravimetric determination of cobalt, palladium, and other metal ions.
• Dye & Pigment Synthesis: Serves as a key intermediate in the production of azo dyes, naphthol AS series pigments, and other complex colorants.
• Pharmaceutical Intermediates: Employed in the synthesis of certain active pharmaceutical ingredients (APIs) and complex organic molecules.
• Rubber & Polymer Additives: Acts as a non-staining antioxidant and stabilizer in synthetic rubber and polymer formulations.
• Corrosion Inhibitors: Utilized in formulations for metal surface treatment and protection due to its metal-chelating ability.
• Research & Development: A valuable building block in organic synthesis and materials science research within academic and industrial laboratories.

Basic Information

Product Name	1-Nitroso-2-Naphthol
CAS No.	131-91-9
Molecular Formula	C10H7NO2
Molecular Weight	173.17 g/mol
Synonyms	2-Hydroxy-1-nitrosonaphthalene; 1-Nitroso-2-naphthalenol; α-Nitroso-β-naphthol; Cobalt reagent; Palladium reagent; Nitroso Naphthol; 1,2-Naphthoquinone 1-oxime
EINECS	205-051-4

Quality Control

Our 1-Nitroso-2-Naphthol is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing including identification, purity assay, and impurity profiling to ensure it meets the high standards required for industrial and laboratory use. Certificates of Analysis (COA) documenting specifications and test results are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Keep away from heat, sparks, and open flame. Due to its light-sensitive nature, containers should be amber-colored or stored in dark conditions.

Specification

Item	Specification
Appearance	Brownish-yellow to orange crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	108 - 112 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.