Description

5-Chloro-2-Hydroxy-3-[2-(3,4,5-Trihydroxyphenyl)Diazenyl]Benzenesulfonic Acid is a high-purity azo dye intermediate and analytical reagent characterized by its specific sulfonic acid and trihydroxy-substituted diazenyl structure. This compound is critical for applications requiring precise color formation and strong chelating properties with metal ions. It is primarily utilized by manufacturers and R&D laboratories in the dye, pigment, and analytical chemistry sectors for synthesizing specialized dyes and as a chromogenic agent in complexometric titrations.

Application

• Azo Dye Synthesis: A key intermediate for producing specialized, high-value azo dyes and pigments with specific color fastness and solubility properties.
• Analytical Reagent: Used as a chromogenic agent and complexometric indicator in analytical chemistry for the detection and quantification of metal ions.
• Research & Development: Serves as a building block in organic synthesis for novel compounds in material science and pharmaceutical research.
• Textile Industry: Employed in the development of dyes for textiles, leather, and other materials requiring specific color shades and chemical resistance.
• Photographic Chemicals: Can be utilized in the formulation of light-sensitive chemicals and color couplers for photographic applications.
• Chelating Agent: Functions as a ligand due to its multiple hydroxyl groups, useful in processes involving metal sequestration or catalysis.

Basic Information

Product Name	5-Chloro-2-Hydroxy-3-[2-(3,4,5-Trihydroxyphenyl)Diazenyl]Benzenesulfonic Acid
CAS No.	946153-47-5
Molecular Formula	C12H8ClN2O7S
Molecular Weight	356.72 g/mol
Synonyms	5-Chloro-2-hydroxy-3-[(2,3,4-trihydroxyphenyl)diazenyl]benzenesulfonic acid; 3-[(3,4,5-Trihydroxyphenyl)azo]-5-chloro-2-hydroxybenzenesulfonic acid; 5-Chloro-2-hydroxy-3-(3,4,5-trihydroxybenzeneazo)benzenesulfonic acid; Benzenesulfonic acid, 5-chloro-2-hydroxy-3-[(3,4,5-trihydroxyphenyl)azo]-; Azo dye intermediate CAS 946153-47-5; Chromotropic acid derivative azo compound
EINECS	Contact for details

Quality Control

Our production of 5-Chloro-2-Hydroxy-3-[2-(3,4,5-Trihydroxyphenyl)Diazenyl]Benzenesulfonic Acid adheres to stringent quality management protocols to ensure batch-to-batch consistency and purity. The material is subjected to rigorous analytical testing, including HPLC, NMR, and FTIR, to verify identity and assay. Certificates of Analysis (COA) documenting all critical parameters are provided with each shipment 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 (15-25°C). Due to its hygroscopic (moisture-sensitive) nature, the container must be kept tightly sealed after each use to prevent degradation from atmospheric moisture. Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Orange to brown powder or crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 95.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 5.0%

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