Description

4-[(2,4-Dihydroxyphenyl)Azo]Benzenesulphonic Acid is an azo dye intermediate and analytical reagent characterized by its distinct molecular structure. This compound matters for its role as a key precursor in the synthesis of specific dyes and pigments, as well as its utility in colorimetric analysis and metal ion detection. Industries that require this chemical include dye and pigment manufacturing, analytical chemistry laboratories, and research institutions focused on material science.

Application

• Dye and Pigment Synthesis: A crucial intermediate for manufacturing specific azo dyes used in textiles, inks, and coatings.
• Analytical Reagent: Employed in colorimetric assays and as a complexometric indicator for the detection and quantification of metal ions.
• Research & Development: Used in chemical research for studying azo compound properties, photochemistry, and developing new functional materials.
• Laboratory Chemical: Serves as a standard or reagent in educational and industrial laboratory settings.

Basic Information

Product Name	4-[(2,4-Dihydroxyphenyl)Azo]Benzenesulphonic Acid
CAS No.	2050-34-2
Molecular Formula	C12H10N2O5S
Molecular Weight	294.28 g/mol
Synonyms	4-[(2,4-Dihydroxyphenyl)diazenyl]benzenesulfonic acid; Mordant Orange 1 (C.I. 14030); Alizarin Yellow R; Acid Alizarin Yellow R; Benzenesulfonic acid, 4-[(2,4-dihydroxyphenyl)azo]-; 2,4-Dihydroxyazobenzene-4'-sulfonic acid; p-(2,4-Dihydroxy-phenylazo)-benzenesulfonic acid
EINECS	218-113-5

Quality Control

Our 4-[(2,4-Dihydroxyphenyl)Azo]Benzenesulphonic Acid is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure identity, purity, and consistency. A comprehensive Certificate of Analysis (COA) detailing specifications and test results is provided with every shipment to guarantee it meets your technical requirements.

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 minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	Orange to brownish-red powder
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.