Description

Sodium 2-Hydroxy-3-[(2-Hydroxy-1-Naphthyl)Azo]-5-Nitrobenzenesulphonate is a specialized azo dye intermediate and analytical reagent. This compound matters for its precise chromophoric properties, enabling the synthesis of vivid, colorfast dyes and serving as a critical reagent in colorimetric detection methods. It is primarily needed by manufacturers in the dye and pigment industry, as well as by research and quality control laboratories for analytical applications.

Application

• Primary Intermediate for Azo Dyes & Pigments: A key building block for synthesizing high-performance orange to red shades used in textiles, inks, and plastics.
• Analytical Chemistry Reagent: Employed in colorimetric assays and as a complexometric indicator for the detection and quantification of specific metal ions.
• Research & Development: Used in academic and industrial R&D for developing new chromogenic compounds and studying azo coupling reactions.
• Specialty Chemical Synthesis: Serves as a precursor for other functional chemicals requiring a naphthyl-azo-nitrobenzenesulphonate structure.

Basic Information

Product Name	Sodium 2-Hydroxy-3-[(2-Hydroxy-1-Naphthyl)Azo]-5-Nitrobenzenesulphonate
CAS No.	94166-70-8
Molecular Formula	C₁₇H₁₀N₃NaO₇S
Molecular Weight	423.33 g/mol
Synonyms	Acid Orange 12; C.I. 15970; 2-Hydroxy-3-[(2-hydroxy-1-naphthyl)azo]-5-nitrobenzenesulfonic acid sodium salt; Benzenesulfonic acid, 2-hydroxy-3-[(2-hydroxy-1-naphthyl)azo]-5-nitro-, sodium salt; Sodium 3-[(2-hydroxy-1-naphthalenyl)azo]-2-hydroxy-5-nitrobenzenesulfonate; 5-Nitro-2-hydroxy-3-[(2-hydroxy-1-naphthyl)azo]benzenesulfonic Acid Sodium Salt; Orange II (related compound); Azo Dye Intermediate OA
EINECS	Contact for details

Quality Control

Our Sodium 2-Hydroxy-3-[(2-Hydroxy-1-Naphthyl)Azo]-5-Nitrobenzenesulphonate is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure consistent purity, color strength, and chemical identity. Certificates of Analysis (COA) detailing assay, impurity profile, and physical specifications are available upon request to support your quality assurance protocols.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after use to prevent absorption of atmospheric moisture, which can affect product performance.

Specification

Item	Specification
Appearance	Orange to red-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Heavy Metals (as Pb)	≤ 20 ppm
Water Solubility	Freely soluble

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