Description

Ammonium p-Hydroxybenzenesulphonate is the ammonium salt of 4-hydroxybenzenesulfonic acid, a key organic intermediate with significant industrial utility. This compound is valued for its role as a versatile building block in the synthesis of more complex molecules, particularly in the production of dyes, pigments, and specialty chemicals. It is essential for manufacturers and R&D laboratories in the chemical, pharmaceutical, and agrochemical sectors seeking reliable, high-purity intermediates.

Application

• Dye and Pigment Intermediate: A crucial precursor in the synthesis of azo dyes, acid dyes, and other colorants.
• Pharmaceutical Synthesis: Used as a building block or sulfonating agent in the manufacture of certain active pharmaceutical ingredients (APIs).
• Agrochemical Production: Serves as an intermediate in the synthesis of herbicides, fungicides, and other crop protection agents.
• Chemical Research & Development: Employed in organic synthesis for introducing the sulfonate functional group.
• Photographic Chemicals: Can be used in the formulation of certain developers and other photographic solutions.
• Electroplating Additives: Functions as a brightening agent or additive in specific electroplating baths.

Basic Information

Product Name	Ammonium p-Hydroxybenzenesulphonate
CAS No.	5328-97-2
Molecular Formula	C6H9NO4S
Molecular Weight	191.21 g/mol
Synonyms	Ammonium 4-Hydroxybenzenesulfonate; Ammonium Phenol-4-sulfonate; 4-Hydroxybenzenesulfonic Acid Ammonium Salt; Ammonium p-Phenolsulfonate; Ammonium Sulfophenylate; Phenol-4-sulfonic Acid Ammonium Salt; p-Hydroxybenzenesulfonic Acid Ammonium Salt; Ammonium Paraphenolsulfonate
EINECS	226-207-1

Quality Control

Our Ammonium p-Hydroxybenzenesulphonate is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for identity, purity, and impurity profiles. A comprehensive Certificate of Analysis (COA) detailing the results is provided with every shipment to guarantee traceability and batch-to-batch consistency for your critical processes.

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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product quality and handling properties.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm
Related Substances (HPLC)	Individual impurity ≤ 0.5%

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