Description

Hydroxymethoxybenzenesulphonic Acid is a versatile aromatic sulfonic acid derivative that serves as a key intermediate in advanced organic synthesis. Its unique structure, combining phenolic, methoxy, and strong sulfonic acid functionalities, makes it valuable for introducing water-solubility and anionic character into target molecules. This compound is essential for manufacturers in the pharmaceutical, agrochemical, and specialty chemical industries seeking to develop new active ingredients or functional materials.

Application

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs), particularly for drugs requiring enhanced solubility or specific ionic properties.
• Agrochemical Synthesis: Serves as a building block for herbicides, fungicides, and plant growth regulators, where the sulfonic acid group can improve systemic activity.
• Dye and Pigment Manufacturing: Acts as a coupling agent and solubilizing group in the production of acid dyes and organic pigments.
• Polymer Modification: Employed to create sulfonated polymers for ion-exchange resins, membranes, and materials with specific hydrophilicity.
• Chemical Research & Development: A valuable reagent for academic and industrial R&D in organic and medicinal chemistry.
• Catalyst and Ligand Preparation: Used to synthesize metal-complexing agents and solid acid catalysts.

Basic Information

Product Name	Hydroxymethoxybenzenesulphonic Acid
CAS No.	50855-43-1
Molecular Formula	C7H8O5S
Molecular Weight	204.20 g/mol
Synonyms	2-Hydroxy-4-methoxybenzenesulfonic acid; 4-Methoxy-2-hydroxybenzenesulfonic acid; Resorcinol monomethyl ether sulfonic acid; 2-Hydroxy-4-methoxy-1-benzenesulfonic acid; 1-Hydroxy-3-methoxy-5-sulfobenzene; Phenol, 2-hydroxy-4-methoxy-, 5-sulfonic acid
EINECS	Contact for details

Quality Control

Our Hydroxymethoxybenzenesulphonic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation by IR and NMR spectroscopy, to ensure it meets exacting standards for use in sensitive syntheses. A Certificate of Analysis (COA) detailing all test results is provided with every shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area away from incompatible materials such as strong bases and oxidizing agents. Recommended storage temperature is 15-25°C. The product is hygroscopic; keep container tightly sealed when not in use to minimize exposure to atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 0.5%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Total impurities ≤ 2.0%

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