Description

p-Anisidine-2-Sulfonic Acid is a key sulfonated aromatic amine intermediate, essential for the synthesis of high-value dyes and pigments. Its structure provides the necessary coupling and chromophoric properties for producing vivid and stable colors. This compound is primarily required by manufacturers in the dye and pigment, pharmaceutical, and agrochemical industries for creating specialized azo compounds and other functional molecules.

Application

• Dye and Pigment Manufacturing: A crucial coupling component for the synthesis of azo dyes, including acid dyes, direct dyes, and reactive dyes, imparting bright yellow to red shades.
• Pharmaceutical Intermediates: Used in the synthesis of specific active pharmaceutical ingredients (APIs) and diagnostic agents that require a sulfonated aniline derivative.
• Agrochemical Synthesis: Serves as a building block for certain herbicides, fungicides, and plant growth regulators.
• Chemical Research & Development: Employed as a specialized reagent in organic synthesis for introducing sulfonic acid and methoxy-substituted aniline functionalities.
• Liquid Crystal and Electronic Materials: Potential intermediate in the production of advanced materials for display technologies.

Basic Information

Product Name	p-Anisidine-2-Sulfonic Acid
CAS No.	6470-17-3
Molecular Formula	C7H9NO4S
Molecular Weight	203.21 g/mol
Synonyms	2-Amino-5-methoxybenzenesulfonic acid; 5-Methoxy-2-aminobenzenesulfonic acid; 4-Methoxy-2-aminobenzenesulfonic acid; p-Methoxyaniline-2-sulfonic acid; 2-Aminoanisole-5-sulfonic acid; Anisidine sulfonic acid; Fast Scarlet GG Base
EINECS	229-297-7

Quality Control

Our p-Anisidine-2-Sulfonic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and industry standards. Certificates of Analysis (COA) documenting all critical parameters are available upon request.

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 (moisture-sensitive) nature, the container must be kept tightly sealed to prevent absorption of atmospheric moisture.

Specification

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