Description

4-Chloro-2-Phenolsulfonic Acid is a versatile aromatic sulfonic acid derivative that serves as a key intermediate in the synthesis of more complex chemical structures. Its value lies in its dual functionality, offering both a reactive phenolic hydroxyl group and a strongly acidic sulfonic acid group, which makes it a valuable building block for dyes, pigments, and specialty chemicals. This compound is primarily needed by manufacturers in the agrochemical, pharmaceutical, and fine chemical industries for creating active ingredients and functional additives.

Application

• Dye and Pigment Intermediate: A crucial precursor in the synthesis of azo dyes, acid dyes, and other colorants.
• Agrochemical Synthesis: Used as a building block for manufacturing herbicides, fungicides, and plant growth regulators.
• Pharmaceutical Intermediate: Serves in the production of certain active pharmaceutical ingredients (APIs) and diagnostic agents.
• Chemical Research & Development: Employed as a reagent in organic synthesis for introducing sulfonic acid groups.
• Surfactant and Detergent Industry: Can be used to synthesize specialized anionic surfactants.
• Corrosion Inhibitor Formulation: Acts as a component in formulations designed to protect metal surfaces.
• Polymer Modification: Utilized to introduce ionic or hydrophilic character into polymers.
• Water Treatment Chemicals: A potential intermediate for scale inhibitors and dispersants.

Basic Information

Product Name	4-Chloro-2-Phenolsulfonic Acid
CAS No.	80382-54-3
Molecular Formula	C6H5ClO4S
Molecular Weight	208.62 g/mol
Synonyms	2-Hydroxy-5-chlorobenzenesulfonic Acid; 5-Chloro-2-hydroxybenzenesulfonic Acid; 4-Chloro-2-hydroxybenzenesulfonic Acid; p-Chloro-o-phenolsulfonic Acid; 2-Phenolsulfonic Acid, 4-chloro-; 5-Chlorosalicylic Acid Sulfonic Acid; Benzenesulfonic acid, 2-hydroxy-5-chloro-
EINECS	Contact for details

Quality Control

Our 4-Chloro-2-Phenolsulfonic Acid is produced under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and impurity profiles. We provide comprehensive Certificates of Analysis (COA) with each shipment, detailing results from HPLC, titration, and other relevant tests to guarantee consistency and reliability for your processes.

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). This product is hygroscopic (moisture-sensitive) and should be kept away from moisture and incompatible materials such as strong bases and oxidizing agents.

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%

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