Description

Sodium 4-Formylbenzenesulfonate is a versatile aromatic sulfonate salt featuring both a formyl and a sulfonate functional group. This unique bifunctional structure makes it a valuable intermediate for synthesizing dyes, optical brighteners, and pharmaceutical compounds. It is essential for manufacturers and R&D laboratories in the chemical, agrochemical, and specialty materials sectors seeking to introduce water-solubilizing and reactive sites into complex molecules.

Application

• Dye and Pigment Intermediate: A key building block for the synthesis of water-soluble azo dyes, acid dyes, and reactive dyes.
• Optical Brightener Production: Used in the manufacture of stilbene-based optical brightening agents (OBAs) for paper, textiles, and detergents.
• Pharmaceutical Synthesis: Serves as a precursor for sulfonamide drugs and other active pharmaceutical ingredients (APIs) requiring enhanced solubility.
• Chemical Crosslinking Agent: Utilized in polymer chemistry to introduce aldehyde groups for crosslinking reactions with amines or hydrazides.
• Electroplating Additive: Functions as a brightener and leveling agent in electroplating baths.
• Research & Development: A valuable reagent in organic synthesis for creating sulfonated aldehydes and further functionalized derivatives.

Basic Information

Product Name	Sodium 4-Formylbenzenesulfonate
CAS No.	13736-22-6
Molecular Formula	C7H5NaO4S
Molecular Weight	208.16 g/mol
Synonyms	4-Formylbenzenesulfonic Acid Sodium Salt; Sodium p-Formylbenzenesulfonate; p-Formylbenzenesulfonic Acid Sodium Salt; Benzenesulfonic acid, 4-formyl-, sodium salt (1:1); 4-Carboxybenzenesulfonic Acid Sodium Salt (common misnomer); SFBS; Sodium Benzaldehyde-4-sulfonate
EINECS	237-322-4

Quality Control

Our Sodium 4-Formylbenzenesulfonate is produced under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, identity, and impurity profiles. Certificates of Analysis (COA) detailing results from HPLC, IR, and titration methods are provided with every shipment to guarantee supply consistency and traceability for your critical 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); the container must be kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Sulfate (as SO4)	≤ 0.1%
Chloride (as Cl)	≤ 0.05%

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