Description

5-Quinolinesulfonic Acid, 8-Hydroxy-7-(6-Sulfo-2-Naphthylazo)- is a high-purity, polyfunctional azo dye intermediate and analytical reagent. This compound is valued for its strong chelating properties and chromogenic characteristics, making it essential for precise colorimetric detection and metal ion analysis. It is primarily utilized by manufacturers and research laboratories in the chemical synthesis, analytical chemistry, and specialty dye industries.

Application

• Analytical Reagent: Used as a sensitive chromogenic agent for the spectrophotometric determination of trace metal ions (e.g., aluminum, magnesium, calcium) in water, environmental, and industrial samples.
• Dye Intermediate: Serves as a key precursor in the synthesis of specialized azo dyes and pigments, particularly those requiring high lightfastness and complexing ability.
• Complexometric Indicator: Employed in titrimetric analysis for endpoint detection in chelatometric titrations due to its distinct color change upon metal binding.
• Research & Development: Utilized in academic and industrial R&D for developing new colorimetric sensors, assays, and functional materials.
• Photographic Chemicals: Can be applied in the formulation of certain light-sensitive layers and photographic chemicals.

Basic Information

Product Name	5-Quinolinesulfonic Acid, 8-Hydroxy-7-(6-Sulfo-2-Naphthylazo)-
CAS No.	56990-57-9
Molecular Formula	C19H12N3O7S2
Molecular Weight	458.44 g/mol
Synonyms	8-Hydroxy-7-[(6-sulfo-2-naphthalenyl)azo]-5-quinolinesulfonic acid; 5-Quinolinesulfonic acid, 8-hydroxy-7-[(6-sulfo-2-naphthyl)azo]-; Mordant Blue 29 (C.I. 43825); Acid Mordant Blue B; Aluminon related compound; 7-(6-Sulfo-2-naphthylazo)-8-hydroxy-5-quinolinesulfonic acid; 8-Hydroxy-7-(6-sulfo-2-naphthylazo)quinoline-5-sulfonic acid
EINECS	Contact for details

Quality Control

Our 5-Quinolinesulfonic Acid, 8-Hydroxy-7-(6-Sulfo-2-Naphthylazo)- is produced under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure identity, purity, and consistency. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical specifications is provided with each shipment to guarantee compliance with your research or production requirements.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, 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)	≥ 95.0%
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Solubility (in water)	Partially soluble, forms a colored solution

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