Description

4,5-Dihydroxy-3,6-Bis[(2-Hydroxy-5-Nitro-3-Sulfophenyl)Azo]-2,7-Naphthalenedisulfonic Acid is a high-purity, complex azo dye intermediate and analytical reagent. This compound is valued for its precise chromophoric properties and ability to form stable complexes with metal ions, making it a critical component in specialized manufacturing and research. It is primarily utilized by industries involved in the production of advanced dyes, pigments, and as a chelating agent in analytical chemistry for trace metal detection.

Application

• Specialty Dye and Pigment Synthesis: Serves as a key precursor for manufacturing high-performance azo dyes and pigments used in textiles, inks, and coatings.
• Analytical Reagent: Employed as a selective chelating agent and colorimetric indicator in analytical chemistry for the detection and quantification of specific metal ions.
• Research & Development: Used in chemical research for studying azo coupling reactions, chromophore behavior, and developing new functional materials.
• Complexometric Titration: Acts as a metallochromic indicator in titrations to determine concentrations of metals like aluminum, iron, or rare earth elements.
• Photographic and Imaging Chemicals: Potential application in the formulation of light-sensitive layers or specialized imaging agents.
• Catalyst and Ligand Preparation: Can be used to synthesize ligands for homogeneous catalysis or metal-organic frameworks (MOFs).

Basic Information

Item	Details
Product Name	4,5-Dihydroxy-3,6-Bis[(2-Hydroxy-5-Nitro-3-Sulfophenyl)Azo]-2,7-Naphthalenedisulfonic Acid
CAS No.	26196-08-7
Molecular Formula	C22H12N6O20S4
Molecular Weight	808.62 g/mol
Synonyms	Acid Chrome Blue K; Chrome Azurol S; Mordant Blue 29; C.I. 43825; 3,6-Bis[(5-Nitro-2-hydroxy-3-sulfophenyl)azo]-4,5-dihydroxy-2,7-naphthalenedisulfonic Acid; Aluminon; CAS 26196-08-7; NSC 403689
EINECS	Contact for details

Quality Control

Our production of 4,5-Dihydroxy-3,6-Bis[(2-Hydroxy-5-Nitro-3-Sulfophenyl)Azo]-2,7-Naphthalenedisulfonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and compliance with customer specifications. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance and regulatory needs.

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). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product stability and performance.

Specification

Item	Specification
Appearance	Dark brown to black powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 5.0%
Solubility	Soluble in water, alkaline solutions
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	≤ 0.5%

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