Description

2-Hydroxy-3-Amino-5-Methoxybenzenesulfonic Acid is a versatile sulfonated aniline derivative that serves as a critical intermediate in the synthesis of complex organic molecules. Its unique structure, featuring hydroxyl, amino, and methoxy substituents on a benzenesulfonic acid core, makes it a valuable building block for creating dyes, pigments, and pharmaceutical compounds. This product is essential for manufacturers and R&D chemists in the fine chemical, specialty dye, and advanced material sectors seeking reliable, high-purity intermediates for their synthesis processes.

Application

• Dye and Pigment Intermediate: A key precursor in the synthesis of azo dyes, acid dyes, and reactive dyes, contributing to color strength and fastness properties.
• Pharmaceutical Synthesis: Used as a building block in the production of active pharmaceutical ingredients (APIs) and other fine chemicals requiring a sulfonated aromatic scaffold.
• Chemical Research & Development: Serves as a versatile starting material for novel compound libraries in agrochemical and material science research.
• Photographic Chemicals: Can be utilized in the formulation of certain photographic developers and other light-sensitive chemical compositions.
• Corrosion Inhibitor Formulation: Acts as a component in specialty chemical blends designed to prevent corrosion in industrial systems.
• Polymer Modification: Employed to introduce sulfonic acid groups into polymers, enhancing properties like hydrophilicity or ion-exchange capacity.

Basic Information

Product Name	2-Hydroxy-3-Amino-5-Methoxybenzenesulfonic Acid
CAS No.	6837-91-8
Molecular Formula	C7H9NO5S
Molecular Weight	219.21 g/mol
Synonyms	3-Amino-5-methoxy-2-hydroxybenzenesulfonic acid; 2-Amino-4-methoxyphenol-6-sulfonic acid; 5-Methoxy-2-aminophenol-4-sulfonic acid; 4-Amino-2-hydroxy-6-methoxybenzenesulfonic acid; 6-Amino-4-methoxyphenol-2-sulfonic acid; 2-Hydroxy-3-aminoanisole-5-sulfonic acid; 3-Amino-5-methoxysalicylic acid sulfonic acid; Aniline derivative intermediate
EINECS	229-925-5

Quality Control

Our 2-Hydroxy-3-Amino-5-Methoxybenzenesulfonic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure identity, purity, and consistency. We provide a detailed Certificate of Analysis (COA) with every shipment, which includes results for assay, impurity profile, and other critical parameters. Our quality commitment ensures the material meets the stringent requirements for use in fine chemical synthesis and other demanding applications.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at room temperature (15-25°C). This compound is hygroscopic (moisture-sensitive); therefore, the container must be kept tightly sealed to prevent absorption of atmospheric moisture, which can affect product quality and stability.

Specification

Item	Specification
Appearance	Light yellow to brown powder or crystalline solid
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
Related Substances (HPLC)	Individual impurity ≤ 0.5%, Total impurities ≤ 1.5%

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