Description

4-[(2-Hydroxy-3,5-Dimethylphenyl)Azo]Benzenesulfonic Acid is a specialized azo dye intermediate and analytical reagent known for its distinct chromophoric properties. This compound is critical for producing high-purity colorants and serves as a key building block in the synthesis of dyes and pigments. It is primarily utilized by manufacturers in the dyestuff, textile, and analytical chemistry industries who require consistent quality and reliable supply chains for their production processes.

Application

• Primary Intermediate for Azo Dyes & Pigments: Serves as a crucial precursor in the synthesis of orange to red-shade dyes for textiles, inks, and plastics.
• Analytical Reagent: Used in laboratory settings as a chromogenic agent for the detection and quantification of specific metal ions or in pH indicator formulations.
• Specialty Chemical Synthesis: Acts as a building block for more complex sulfonated aromatic compounds used in various fine chemical applications.
• Research & Development: Employed in academic and industrial R&D for developing new colorants, sensors, and functional materials.

Basic Information

Product Name	4-[(2-Hydroxy-3,5-Dimethylphenyl)Azo]Benzenesulfonic Acid
CAS No.	68941-04-8
Molecular Formula	C14H14N2O4S
Molecular Weight	306.34 g/mol
Synonyms	Benzenesulfonic acid, 4-[(2-hydroxy-3,5-dimethylphenyl)azo]-; 3,5-Dimethyl-4-(4-sulfophenylazo)phenol; 4-(2-Hydroxy-3,5-dimethylphenylazo)benzenesulfonic acid; Azo dye intermediate 68941-04-8; 2-Hydroxy-3,5-dimethyl-4-(phenylazo)benzenesulfonic Acid; (2-Hydroxy-3,5-dimethylphenyl)(4-sulfophenyl)diazene
EINECS	Contact for details

Quality Control

Our production of 4-[(2-Hydroxy-3,5-Dimethylphenyl)Azo]Benzenesulfonic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and reliability. Every lot undergoes comprehensive analytical testing, including purity assay and impurity profiling. Certificates of Analysis (COA) documenting all critical quality attributes 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 sealed to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Orange to red powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Residue on Ignition (Sulfated Ash)	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm

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