Description

5-Chloro-2-Formylbenzenesulphonic Acid is a key aromatic sulfonic acid derivative, valued for its dual functional groups which make it a versatile building block in advanced chemical synthesis. Its primary commercial significance lies in its role as a crucial intermediate for manufacturing high-value specialty chemicals, including dyes, pharmaceuticals, and agrochemicals. This compound is essential for R&D and production facilities in the fine chemical, pharmaceutical, and performance material sectors seeking to develop novel compounds with specific functional properties.

Application

• Pharmaceutical Intermediate: A critical precursor in the synthesis of active pharmaceutical ingredients (APIs), particularly those requiring a sulfonic acid or aldehyde moiety for further functionalization.
• Dye and Pigment Manufacturing: Serves as a key intermediate for producing sulfonated azo dyes and other complex colorants, offering enhanced solubility and color fastness.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and plant growth regulators where the chlorobenzene and sulfonic acid groups contribute to biological activity.
• Ligand and Catalyst Preparation: Employed in the development of specialized ligands for metal catalysis and in the synthesis of organocatalysts for asymmetric synthesis.
• Polymer Modification: Acts as a monomer or modifying agent for creating ion-exchange resins, sulfonated polymers, and specialty polyelectrolytes.
• Research & Development: A valuable building block in organic chemistry research for constructing complex molecular architectures in academia and industrial R&D labs.

Basic Information

Product Name	5-Chloro-2-Formylbenzenesulphonic Acid
CAS No.	88-33-5
Molecular Formula	C7H5ClO4S
Molecular Weight	220.63 g/mol
Synonyms	5-Chloro-2-formylbenzenesulfonic acid; 2-Formyl-5-chlorobenzenesulfonic acid; 5-Chlorosalicylaldehyde-2-sulfonic acid; 5-Chloro-2-sulfobenzaldehyde; 2-Carboxy-4-chlorobenzenesulfonic acid (related form); 88-33-5; NSC 403107
EINECS	201-819-7

Quality Control

Our 5-Chloro-2-Formylbenzenesulphonic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and industry standards. A Certificate of Analysis (COA) detailing all test results is provided with every shipment to guarantee traceability and compliance.

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 tightly sealed to prevent moisture absorption, which can affect product stability and performance. Keep away from 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%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Chloride Content	Conforms
Sulfate Ash	≤ 0.1%

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