Description

2-[(8-Hydroxy-5-Sulfoquinolin-7-Yl)Azo]Benzoic Acid is a high-purity azo dye intermediate and analytical reagent known for its strong chelating properties and vivid color formation. This compound is critical for applications requiring precise colorimetric detection of metal ions and the synthesis of specialized dyes and pigments. It is primarily needed by manufacturers and R&D laboratories in the analytical chemistry, textile dyeing, and specialty chemical synthesis sectors.

Application

• Analytical Reagent: Used as a sensitive colorimetric indicator and chelating agent for the detection and quantification of metal ions (e.g., aluminum, iron) in environmental and industrial samples.
• Dye & Pigment Intermediate: Serves as a key precursor in the synthesis of high-performance azo dyes and pigments for textiles, inks, and coatings.
• Complexometric Titration: Employed in analytical chemistry as a metallochromic indicator for titrations involving transition metals.
• Research & Development: Utilized in chemical research for developing new chelating agents, sensors, and photochemical systems.
• Photographic Chemicals: Can be used in the formulation of certain light-sensitive materials and photographic developers.
• Catalyst Ligand: Potential application as a ligand in catalytic systems due to its quinoline and azo functional groups.

Basic Information

Product Name	2-[(8-Hydroxy-5-Sulfoquinolin-7-Yl)Azo]Benzoic Acid
CAS No.	72568-35-5
Molecular Formula	C₁₆H₁₁N₃O₆S
Molecular Weight	373.34 g/mol
Synonyms	7-[(2-Carboxyphenyl)azo]-8-hydroxy-5-quinolinesulfonic acid; 8-Hydroxy-7-[(2-carboxyphenyl)azo]-5-quinolinesulfonic acid; Benzoic acid, 2-[(8-hydroxy-5-sulfo-7-quinolinyl)azo]-; 5-Sulfo-8-hydroxy-7-(2-carboxyphenylazo)quinoline; Azo dye intermediate 72568-35-5; HSAQ (Hydroxy Sulfo Azo Quinoline); Metal indicator 72568-35-5
EINECS	Contact for details

Quality Control

Our 2-[(8-Hydroxy-5-Sulfoquinolin-7-Yl)Azo]Benzoic Acid is produced under strict quality management systems. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation via IR and NMR spectroscopy, to ensure it meets precise customer specifications. Certificates of Analysis (COA) detailing purity, assay, and impurity profiles are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed after opening to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Orange to reddish-brown powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (1% in NaOH)	Clear, orange solution

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