Description

2-Acetamidophenol-4-Sulfonic Acid is a key sulfonated phenolic intermediate with significant synthetic utility. This compound is valued for its dual functionality, combining a reactive phenolic hydroxyl group with a sulfonic acid moiety, making it a versatile building block for more complex molecules. It is primarily sought after by manufacturers in the pharmaceutical and specialty chemical industries for the synthesis of active pharmaceutical ingredients (APIs), dyes, and advanced materials.

Application

• Pharmaceutical Intermediate: A crucial precursor in the synthesis of various active pharmaceutical ingredients (APIs), particularly those requiring sulfonated or phenolic backbones.
• Dye and Pigment Manufacturing: Serves as a key intermediate for producing sulfonated azo dyes and other colorants, enhancing water solubility and color fastness.
• Chemical Synthesis Building Block: Used in organic synthesis to introduce both phenolic and sulfonic acid functional groups into target molecules for agrochemicals and specialty polymers.
• Research & Development: Employed in academic and industrial R&D labs for developing new chemical entities and studying sulfonation chemistry.
• Photographic Chemical: Can be utilized in the formulation of certain photographic developers and processing agents.

Basic Information

Product Name	2-Acetamidophenol-4-Sulfonic Acid
CAS No.	153835-66-6
Molecular Formula	C8H9NO5S
Molecular Weight	231.22 g/mol
Synonyms	4-Hydroxy-3-acetamidobenzenesulfonic Acid; N-Acetyl-2-hydroxy-5-aminobenzenesulfonic Acid; 2-Acetamido-4-hydroxybenzenesulfonic Acid; 5-Acetamido-2-hydroxybenzenesulfonic Acid; 2-Acetylamino-4-hydroxybenzenesulfonic Acid; 4-Sulfo-2-acetamidophenol; 2-Hydroxy-5-acetamidobenzenesulfonic Acid
EINECS	Contact for details

Quality Control

Every batch of 2-Acetamidophenol-4-Sulfonic Acid is produced under a strict quality management system. Our products undergo rigorous analytical testing, including HPLC and titration methods, to ensure high purity and consistency that meets the demanding requirements of pharmaceutical and fine chemical synthesis. A comprehensive Certificate of Analysis (COA) detailing identity, purity, and impurity profiles is provided with each shipment and is 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 after opening to prevent absorption of atmospheric moisture. Keep away from strong acids and incompatible organic solvents.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 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.