Description

2-Hydroxy-5-(4-Carboxybenzenesulfonyloxy)Benzene Sulfonic Acid is a multifunctional aromatic sulfonic acid derivative, valued for its unique chemical structure that incorporates both sulfonic acid and carboxylic acid groups. This compound serves as a versatile intermediate and functional additive, offering excellent water solubility and chelating properties. It is primarily utilized in the synthesis of specialty chemicals, advanced materials, and as a key component in industrial processes requiring specific ionic or surface-active characteristics.

Application

• Specialty Dye & Pigment Intermediate: Used in the synthesis of high-performance, water-soluble dyes and organic pigments.
• Pharmaceutical Synthesis: Acts as a key building block or catalyst in the production of certain active pharmaceutical ingredients (APIs).
• Electroplating & Metal Surface Treatment: Functions as a brightening agent, complexing agent, or additive in electroplating baths to improve finish quality and metal deposition.
• Polymer & Resin Modification: Employed to introduce sulfonic acid groups into polymers, enhancing hydrophilicity, ion-exchange capacity, or catalytic properties.
• Water Treatment Chemicals: Utilized as a scale inhibitor or dispersant in industrial water treatment systems due to its chelating ability.
• Analytical Reagent: Serves as a standard or reagent in analytical chemistry for method development and calibration.

Basic Information

Product Name	2-Hydroxy-5-(4-Carboxybenzenesulfonyloxy)Benzene Sulfonic Acid
CAS No.	83285-81-8
Molecular Formula	C14H10O9S2
Molecular Weight	410.35 g/mol
Synonyms	5-(4-Carboxybenzenesulfonyloxy)-2-hydroxybenzenesulfonic Acid; 2-Hydroxy-5-[(4-carboxyphenyl)sulfonyloxy]benzenesulfonic Acid; Benzenesulfonic acid, 2-hydroxy-5-[(4-carboxyphenyl)sulfonyloxy]-; 4-Carboxybenzenesulfonic acid 2-hydroxy-5-sulfophenyl ester; Terephthalic acid sulfophenyl ester sulfonic acid derivative
EINECS	Contact for details

Quality Control

Our production of 2-Hydroxy-5-(4-Carboxybenzenesulfonyloxy)Benzene Sulfonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure consistency and meet customer specifications. A detailed Certificate of Analysis (COA) is provided with each shipment, documenting all critical quality attributes.

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

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 1.5%

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