Description

4-(Ethylanilino)-Sulfonic Acid is a specialized organic intermediate featuring a sulfonic acid group attached to an ethyl-substituted aniline moiety. This compound is valued for its role as a key building block in the synthesis of dyes, pigments, and functional materials, where it imparts solubility and ionic character. It is primarily utilized by manufacturers in the fine chemical, dye, and pharmaceutical intermediate sectors seeking reliable, high-purity raw materials for complex synthesis.

Application

• Dye and Pigment Intermediate: A crucial precursor in the synthesis of acid dyes, reactive dyes, and organic pigments.
• Pharmaceutical Synthesis: Serves as a building block for active pharmaceutical ingredients (APIs) and other bioactive molecules.
• Functional Material Production: Used in the manufacture of optical brighteners, liquid crystal materials, and other specialty chemicals.
• Research & Development: Employed in chemical research for developing new sulfonated compounds and studying structure-activity relationships.
• Chemical Synthesis: Acts as a sulfonation agent or an intermediate in multi-step organic synthesis processes.

Basic Information

Product Name	4-(Ethylanilino)-Sulfonic Acid
CAS No.	58443-50-8
Molecular Formula	C8H11NO3S
Molecular Weight	201.24 g/mol
Synonyms	4-(Ethylamino)benzenesulfonic Acid; N-Ethyl-4-aminobenzenesulfonic Acid; p-(Ethylamino)benzenesulfonic Acid; Benzenesulfonic acid, 4-(ethylamino)-; 4-Ethylaminobenzenesulfonic Acid; N-Ethylaniline-4-sulfonic Acid
EINECS	Contact for details

Quality Control

Our 4-(Ethylanilino)-Sulfonic Acid is produced under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for identity, purity, and impurity profiles. Certificates of Analysis (COA) documenting these results are available upon request to support your quality assurance and regulatory compliance needs.

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	White to off-white powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 0.5%
Heavy Metals	≤ 20 ppm

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