Description

4-Formyl-5-Hydroxybenzenesulfonic Acid is a key aromatic sulfonic acid derivative featuring both formyl and phenolic hydroxyl functional groups. This unique bifunctional structure makes it a versatile and valuable chemical intermediate for the synthesis of more complex molecules. It is primarily utilized in the production of pharmaceuticals, specialty dyes, and advanced materials where precise molecular architecture is required.

Application

• Pharmaceutical Intermediate: A crucial building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for compounds requiring a sulfonated aromatic core.
• Dye and Pigment Manufacturing: Serves as a key intermediate for producing high-performance, water-soluble azo dyes and pigments with enhanced color fastness.
• Chemical Synthesis Reagent: Used in organic synthesis for introducing both aldehyde and sulfonic acid groups into target molecules, facilitating further functionalization.
• Ligand and Chelating Agent Precursor: Employed in the development of specialized ligands for metal catalysis and chelating agents for water treatment or analytical chemistry.
• Polymer Modification: Acts as a monomer or modifier in the creation of specialty polymers, such as ion-exchange resins or polymers with specific light-absorbing properties.
• Research and Development: Used in academic and industrial R&D labs for exploring new synthetic pathways and novel chemical entities.

Basic Information

Product Name	4-Formyl-5-Hydroxybenzenesulfonic Acid
CAS No.	106086-27-5
Molecular Formula	C7H6O5S
Molecular Weight	202.18 g/mol
Synonyms	5-Hydroxy-4-formylbenzenesulfonic Acid; 4-Formyl-5-hydroxybenzene-1-sulfonic acid; 2-Hydroxy-5-sulfobenzaldehyde; 5-Sulfosalicylaldehyde; 2-Hydroxy-5-formylbenzenesulfonic Acid; 5-Formyl-2-hydroxybenzenesulfonic Acid; 5-Hydroxy-4-sulfobenzaldehyde
EINECS	Contact for details

Quality Control

Our production of 4-Formyl-5-Hydroxybenzenesulfonic Acid adheres to stringent quality management protocols. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications. A Certificate of Analysis (COA) detailing all test results is provided with each 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 room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption. Keep away from incompatible materials such as strong oxidizing agents.

Specification

Item	Specification
Appearance	Off-white to light yellow crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition (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.