Description

1-Nitroso-2-Naphthol-3,6-Disulfonic Acid Disodium Salt is a water-soluble, orange to brown crystalline powder primarily used as a key intermediate and analytical reagent. Its core value lies in its strong chelating properties, particularly for metal ions like cobalt, iron, and copper, making it essential for precise chemical synthesis and analysis. This compound is critically needed by manufacturers and R&D laboratories in the dye and pigment, analytical chemistry, and water treatment industries.

Application

• Analytical Chemistry: Used as a specific and sensitive colorimetric reagent for the detection and quantitative determination of cobalt ions.
• Dye & Pigment Intermediate: Serves as a crucial precursor in the synthesis of certain azo dyes and complex colorants.
• Metal Chelation & Separation: Employed in processes for the selective extraction, separation, or masking of transition metals like cobalt and iron.
• Water Treatment: Acts as a sequestering agent to control metal ion contamination in industrial water systems.
• Research & Development: Utilized in laboratory-scale synthesis and as a standard in method development for metal analysis.
• Catalyst Preparation: Used in the preparation of certain metal-complex catalysts.

Basic Information

Product Name	1-Nitroso-2-Naphthol-3,6-Disulfonic Acid Disodium Salt
CAS No.	525-05-3
Molecular Formula	C₁₀H₆NNa₂O₈S₂
Molecular Weight	377.24 g/mol
Synonyms	Disodium 1-Nitroso-2-naphthol-3,6-disulfonate; Nitroso R Salt; 1-Nitroso-2-naphthol-3,6-disulfonic acid sodium salt; Cobalt Reagent; 2-Naphthol, 1-nitroso-, 3,6-disulfonic acid, disodium salt; Nitroso-R-Salt; 3,6-Disulfo-1-nitroso-2-naphthol disodium salt; R Salt, Nitroso
EINECS	208-361-1

Quality Control

Our 1-Nitroso-2-Naphthol-3,6-Disulfonic Acid Disodium Salt is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure consistent purity and performance, meeting the specifications required for analytical and industrial applications. A comprehensive Certificate of Analysis (COA) detailing identity, assay, and impurity profiles is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated place at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive) and light-sensitive; containers must be kept tightly sealed to minimize exposure to atmospheric moisture and light to prevent degradation.

Specification

Item	Specification
Appearance	Orange to brown crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 95.0%
Solubility (in Water)	Clear, orange solution
Loss on Drying	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm

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