Description

8-Hydroxy-7-(6-Sulfo-2-Naphthylazo)-5-Quinolinesulfonic Acid Disodium Salt is a high-purity, water-soluble azo dye intermediate and analytical reagent. This compound is valued for its strong chelating properties and its ability to form stable, colored complexes with various metal ions, making it a critical component in specialized chemical synthesis and analysis. It is primarily utilized by manufacturers and research laboratories in the chemical, analytical, and specialty materials sectors.

Application

• Analytical Reagent: Used as a sensitive colorimetric indicator and chelating agent for the detection and quantification of specific metal ions (e.g., aluminum, magnesium) in analytical chemistry and environmental testing.
• Specialty Dye Intermediate: Serves as a key precursor in the synthesis of complex azo dyes and pigments, particularly those requiring high lightfastness and specific color properties.
• Complexometric Titration: Employed as a metallochromic indicator in EDTA titrations for determining water hardness and metal ion concentrations in industrial process streams.
• Photographic Industry: Functions in certain photographic chemicals and sensitizers due to its light-absorbing characteristics.
• Research & Development: Utilized in academic and industrial R&D for studying coordination chemistry, developing new sensor materials, and creating novel functional dyes.
• Textile Auxiliary: Can be used in the development of specialized dyeing and printing processes for synthetic fibers.

Basic Information

Product Name	8-Hydroxy-7-(6-Sulfo-2-Naphthylazo)-5-Quinolinesulfonic Acid Disodium Salt
CAS No.	56932-43-5
Molecular Formula	C19H11N3Na2O8S2
Molecular Weight	519.41 g/mol
Synonyms	Acid Chrome Blue K; Mordant Blue 1; Aluminon; Ammonium aurintricarboxylate (related compound); 5-[(3-Carboxy-4-hydroxyphenyl)(3-carboxy-4-oxo-2,5-cyclohexadien-1-ylidene)methyl]-2-hydroxybenzoic acid triammonium salt (related IUPAC); C.I. 43830; Aurintricarboxylic acid ammonium salt; ATA
EINECS	Contact for details

Quality Control

Our 8-Hydroxy-7-(6-Sulfo-2-Naphthylazo)-5-Quinolinesulfonic Acid Disodium Salt is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for use as an analytical reagent and intermediate. Certificates of Analysis (COA) documenting batch-specific results are available upon request.

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 product is hygroscopic (moisture-sensitive); ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture, which can affect purity and performance.

Specification

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

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