Description

Aniline-2-Sulfonic Acid is a key aromatic sulfonic acid derivative, serving as a versatile intermediate in the synthesis of dyes, pigments, and specialty chemicals. Its primary value lies in its ability to introduce both an amino and a sulfonic acid functional group into target molecules, enabling the creation of water-soluble and color-fast products. This compound is essential for manufacturers in the dye and pigment, pharmaceutical, and agrochemical industries seeking reliable and high-purity building blocks for their synthesis processes.

Application

• Dye and Pigment Manufacturing: A crucial intermediate for producing azo dyes, acid dyes, and reactive dyes, contributing to color strength and solubility.
• Pharmaceutical Intermediates: Used in the synthesis of certain active pharmaceutical ingredients (APIs) and diagnostic agents.
• Agrochemical Synthesis: Serves as a building block for herbicides, fungicides, and other crop protection chemicals.
• Chemical Research & Development: Employed as a reagent in organic synthesis and material science research.
• Corrosion Inhibitors: A component in formulations designed to protect metals in industrial systems.
• Photographic Chemicals: Used in the production of certain light-sensitive materials and developers.

Basic Information

Product Name	Aniline-2-Sulfonic Acid
CAS No.	88-21-1
Molecular Formula	C6H7NO3S
Molecular Weight	173.19 g/mol
Synonyms	2-Aminobenzenesulfonic Acid; Orthanilic Acid; o-Anilinesulfonic Acid; 2-Sulfoaniline; Aniline-o-sulfonic Acid; 2-Aminophenylsulfonic Acid; o-Sulfanilic Acid; Benzenesulfonic acid, 2-amino-
EINECS	201-810-9

Quality Control

Our Aniline-2-Sulfonic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity, identity, and impurity profiles. We provide Certificates of Analysis (COA) with every shipment, detailing the results of key tests such as assay, moisture content, and heavy metals. Our quality commitment ensures batch-to-batch consistency for your critical applications.

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 when not in use to prevent absorption of atmospheric moisture, which can affect product quality and handling.

Specification

Item	Specification
Appearance	Off-white to light brown crystalline powder
Identification (IR)	Conforms
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.