Description

1-Hydroxy-4-[(2-Hydroxy-3,5-Dinitrophenyl)Azo]-2-Naphthoic Acid Sodium Salt is a high-purity azo dye intermediate and analytical reagent known for its distinct chromophoric properties. This compound is critical for applications requiring precise color formation and complexometric analysis. It is primarily utilized by manufacturers and research laboratories in the dye, pigment, and chemical analysis industries.

Application

• Dye and Pigment Intermediate: Serves as a key precursor for synthesizing specific azo dyes and pigments, particularly those requiring a naphthol structure for color fastness and intensity.
• Complexometric Indicator: Used in analytical chemistry as a metallochromic indicator for the titration of metal ions such as calcium, magnesium, and zinc due to its color change upon chelation.
• Research & Development: Employed in chemical research for studying azo coupling reactions and developing new chromogenic reagents for analytical methods.
• Textile Industry: Potential use in the development of specialized dyes for textile fibers where specific lightfastness and chemical resistance are required.
• Laboratory Reagent: Supplied as a high-purity standard for calibration and validation of analytical procedures in quality control laboratories.

Basic Information

Product Name	1-Hydroxy-4-[(2-Hydroxy-3,5-Dinitrophenyl)Azo]-2-Naphthoic Acid Sodium Salt
CAS No.	6535-38-2
Molecular Formula	C₁₇H₉N₄NaO₈
Molecular Weight	420.27 g/mol
Synonyms	Calcon; Calconcarboxylic Acid Sodium Salt; 3-Hydroxy-4-[(2-hydroxy-1-naphthyl)azo]naphthalene-1-sulfonic Acid Sodium Salt (common misnomer); Mordant Black 17; CI 15705; Eriochrome Blue Black R; 1-(2-Hydroxy-3,5-dinitrophenylazo)-2-naphthol-4-carboxylic Acid Sodium Salt
EINECS	229-456-5

Quality Control

Our 1-Hydroxy-4-[(2-Hydroxy-3,5-Dinitrophenyl)Azo]-2-Naphthoic Acid Sodium Salt is manufactured under strict quality protocols. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation via IR spectroscopy, to ensure it meets exacting standards for use as a reagent and intermediate. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with every shipment to guarantee traceability and consistency for your critical processes.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at room temperature (15-25°C). This material is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	Dark brown to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (1% in Water)	Clear, red solution

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