Description

4-(1,8-Dihydroxy-3,6-Disulfo-2-Naphthylazo)-Salicylic Acid is a specialized azo dye intermediate and analytical reagent known for its strong chelating properties. This compound is valued for its ability to form stable, colored complexes with various metal ions, making it a critical component in detection and quantification processes. It is primarily sought by manufacturers and researchers in the chemical synthesis, analytical chemistry, and metallurgy sectors.

Application

• Analytical Reagent: Used as a sensitive colorimetric indicator and chelating agent for the detection and determination of metal ions such as aluminum, iron, and rare earth elements in spectroscopic analysis.
• Dye and Pigment Intermediate: Serves as a key precursor in the synthesis of specific azo dyes and pigments, particularly those requiring high color fastness and complexing ability.
• Complexometric Titration: Employed as a metallochromic indicator in titrations to determine the concentration of metal ions in solution.
• Research & Development: Utilized in chemical research for studying coordination chemistry and developing new metal-selective sensors or extraction agents.
• Water Treatment Analysis: Applied in environmental testing kits and procedures to measure trace metal contaminants in water samples.
• Pharmaceutical Analysis: Potentially used in the quality control of pharmaceuticals to test for metal catalyst residues or impurities.

Basic Information

Product Name	4-(1,8-Dihydroxy-3,6-Disulfo-2-Naphthylazo)-Salicylic Acid
CAS No.	36913-07-2
Molecular Formula	C17H10N2O10S2
Molecular Weight	466.40 g/mol
Synonyms	Aluminon; Aurintricarboxylic Acid Ammonium Salt (related); 5-[(3-Carboxy-4-hydroxyphenyl)azo]-2,4,6-trihydroxybenzenesulfonic Acid; C.I. 43810; Ammonium aurintricarboxylate (common salt form); 4,5-Dihydroxy-3-(p-sulfophenylazo)-2,7-naphthalenedisulfonic Acid; 2,6-Dihydroxy-5-[(2-hydroxy-5-sulfophenyl)azo]-1,3-benzenedisulfonic Acid; 1,8-Dihydroxy-2-(2-hydroxy-4-sulfophenylazo)-3,6-naphthalenedisulfonic Acid
EINECS	Contact for details

Quality Control

Our production of 4-(1,8-Dihydroxy-3,6-Disulfo-2-Naphthylazo)-Salicylic Acid adheres to stringent quality protocols to ensure batch-to-batch consistency and high purity for sensitive applications. The product is manufactured and tested in facilities that follow cGMP principles. Comprehensive quality testing includes identity confirmation, purity assay, and impurity profiling. A Certificate of Analysis (COA) detailing all test results and specifications is provided with each shipment.

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 (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent absorption of atmospheric moisture, which can affect purity and performance.

Specification

Item	Specification
Appearance	Orange to brown-red powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0 %
Residue on Ignition (Sulfated Ash)	≤ 0.5 %
Heavy Metals (as Pb)	≤ 20 ppm
Iron (Fe)	≤ 50 ppm
Solubility (in Water)	Clear, orange solution

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