Description

3-Hydroxy-4-Methoxybenzenesulfonic Acid Sodium Salt is a versatile organic intermediate and functional chemical building block. Its sulfonate and phenolic hydroxyl groups make it a valuable precursor for synthesizing dyes, pigments, and specialty chemicals. This compound is particularly sought after by manufacturers in the fine chemical, pharmaceutical, and agrochemical industries for its role in creating light-sensitive materials and other advanced functional molecules.

Application

• Dye and Pigment Intermediate: A key precursor in the synthesis of azo dyes, acid dyes, and other colorants, contributing to lightfastness and solubility.
• Pharmaceutical Synthesis: Used as a building block for active pharmaceutical ingredients (APIs) and fine chemicals requiring specific sulfonated aromatic structures.
• Photographic Chemicals: Serves as a component in the formulation of light-sensitive emulsions and developers.
• Agrochemical Formulations: Employed in the synthesis of certain herbicides and plant growth regulators.
• Chemical Research & Development: A valuable reagent for organic synthesis and material science research.
• Electroplating Additives: Can function as a brightening agent or stabilizer in specific electroplating baths.

Basic Information

Product Name	3-Hydroxy-4-Methoxybenzenesulfonic Acid Sodium Salt
CAS No.	18436-49-2
Molecular Formula	C7H7NaO5S
Molecular Weight	226.18 g/mol
Synonyms	Sodium 3-Hydroxy-4-methoxybenzenesulfonate; 4-Methoxy-3-hydroxybenzenesulfonic Acid Sodium Salt; 3-Hydroxy-4-methoxybenzene-1-sulfonic Acid Sodium Salt; 4-Methoxyresorcinolsulfonic Acid Sodium Salt; Sodium 4-Methoxy-3-hydroxybenzenesulfonate; 2-Methoxy-5-sulfophenol Sodium Salt; Phenol, 2-methoxy-5-sulfo-, sodium salt
EINECS	242-313-3

Quality Control

Our 3-Hydroxy-4-Methoxybenzenesulfonic Acid Sodium Salt is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing to ensure consistent purity, identity, and performance. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical specifications is provided with every shipment to guarantee compliance with your technical requirements.

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, which can affect quality.

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
Residue on Ignition	≤ 0.5%
pH (5% Solution)	6.0 - 8.0

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