Description

3,3'-[(4,6-Dihydroxy-1,3-Phenylene)Bis(Azo)]Bisbenzenesulfonic Acid is a high-purity, synthetic azo dye intermediate characterized by its disulfonated aromatic structure. This compound is essential for producing vivid and stable colorants, offering superior performance in demanding applications where consistent quality is critical. It is primarily utilized by manufacturers in the dye and pigment industries, as well as in research and development for advanced material science.

Application

• Primary Intermediate for Azo Dyes: Serves as a key building block in the synthesis of acid dyes, direct dyes, and reactive dyes for textiles, leather, and paper.
• Pigment Manufacturing: Used in the production of high-performance organic pigments for inks, plastics, and coatings.
• Laboratory Reagent: Employed as a standard or research chemical in analytical chemistry and photochemical studies.
• Specialty Chemical Synthesis: Acts as a precursor for more complex sulfonated aromatic compounds used in various industrial processes.
• Potential Biological Staining: Investigated for use in histological stains due to its azo chromophore and sulfonic acid groups.

Basic Information

Product Name	3,3'-[(4,6-Dihydroxy-1,3-Phenylene)Bis(Azo)]Bisbenzenesulfonic Acid
CAS No.	72208-26-5
Molecular Formula	C18H14N4O8S2
Molecular Weight	478.46 g/mol
Synonyms	3,3'-[(4,6-Dihydroxy-m-phenylene)bis(azo)]bis(benzenesulfonic acid); 4,6-Dihydroxy-1,3-phenylenebis(azo-3,1-phenylene-3-sulfonic acid); Bis(3-sulfophenyl)azo Resorcinol Derivative; Acid Dye Intermediate 72208-26-5; m-Phenylenebis(azo-m-benzenedisulfonic acid), 4,6-dihydroxy-; C.I. 18050 (related structure); Disulfonated Azo Dye Intermediate
EINECS	Contact for details

Quality Control

Our production of 3,3'-[(4,6-Dihydroxy-1,3-Phenylene)Bis(Azo)]Bisbenzenesulfonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and industry benchmarks. Certificates of Analysis (COA) documenting all critical parameters are available upon request to support your quality assurance and regulatory compliance needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (typically 15-25°C). Keep away from incompatible materials such as strong oxidizing agents. The product is light-sensitive and should be stored away from direct light exposure to maintain stability.

Specification

Item	Specification
Appearance	Brown to dark brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0% (Area %)
Loss on Drying	≤ 2.0%
Sulfated Ash	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 1.0%; Total impurities ≤ 3.0%
Solubility	Soluble in water, alkaline solutions; slightly soluble in most organic solvents

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