Description

p-Formylbenzenesulphonic Acid is a key aromatic sulfonic acid derivative bearing a formyl functional group, making it a versatile bifunctional intermediate. Its primary value lies in its dual reactivity, serving as a crucial building block for synthesizing specialty chemicals, dyes, and pharmaceutical intermediates. This compound is essential for manufacturers in the fine chemical, agrochemical, and specialty polymer industries seeking to introduce both sulfonic acid and aldehyde moieties into their target molecules.

Application

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs) and diagnostic agents.
• Dye and Pigment Manufacturing: Acts as a key intermediate for producing sulfonated azo dyes and other colorants.
• Agrochemical Synthesis: Employed in creating herbicides, fungicides, and plant growth regulators.
• Polymer Modification: Used to introduce sulfonate groups into polymers for enhanced solubility or ion-exchange properties.
• Crosslinking Agent: Functions in resin and coating formulations due to its reactive aldehyde group.
• Chemical Research: Serves as a reagent in organic synthesis and catalysis research.
• Electroplating Additives: Can be used in bath formulations for metal surface treatment.
• Photographic Chemicals: Potential use in the synthesis of certain photographic sensitizers.

Basic Information

Item	Detail
Product Name	p-Formylbenzenesulphonic Acid
CAS No.	5363-54-2
Molecular Formula	C7H6O4S
Molecular Weight	186.18 g/mol
Synonyms	4-Formylbenzenesulfonic Acid; p-Aldehydebenzenesulfonic Acid; 4-Carboxybenzenesulfonic Acid (tautomer); Terephthalaldehydic Acid Sulfonic Acid; Benzaldehyde-4-sulfonic Acid; 4-Sulfobenzaldehyde; 1-Carboxy-4-sulfobenzene; 4-Formylphenylsulfonic Acid
EINECS	226-341-5

Quality Control

Our p-Formylbenzenesulphonic Acid is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for identity, purity, and impurity profiles. Certificates of Analysis (COA) detailing results from methods such as HPLC, titration, and IR spectroscopy are provided with every shipment to guarantee consistent quality and traceability for your production 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 a strong acid; ensure the container is kept tightly sealed to prevent absorption of atmospheric moisture and stored separately from bases and reactive materials.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Melting Point	Contact for details
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.