Description

Benzenesulfonicacid,2(Or4)-Hydroxy- is a versatile aromatic sulfonic acid derivative, a key intermediate in fine chemical synthesis. Its value lies in its dual functionality, combining the strong acidity of a sulfonic acid group with the reactivity of a phenolic hydroxyl group. This compound is essential for manufacturers in the agrochemical, pharmaceutical, and specialty dye industries seeking to build complex molecular architectures.

Application

• As a crucial intermediate in pharmaceutical synthesis for active pharmaceutical ingredients (APIs).
• In the production of agrochemicals, including herbicides, fungicides, and plant growth regulators.
• As a building block for azo dyes and pigments, where it acts as a diazo component or coupling agent.
• For the synthesis of ion-exchange resins and specialty polymers.
• In the manufacture of corrosion inhibitors and metal surface treatment agents.
• As a catalyst or co-catalyst in various organic synthesis reactions.
• In research and development for creating novel fine chemicals and functional materials.

Basic Information

Product Name	Benzenesulfonicacid,2(Or4)-Hydroxy-
CAS No.	91200-24-7
Molecular Formula	C6H6O4S
Molecular Weight	174.18 g/mol
Synonyms	2-Hydroxybenzenesulfonic acid; 4-Hydroxybenzenesulfonic acid; Phenol-2-sulfonic acid; Phenol-4-sulfonic acid; Phenolsulfonic acid; Sulfocarbolic acid; Hydroxybenzene sulfonate; 2(4)-Hydroxybenzenesulfonic acid (isomeric mixture)
EINECS	Contact for details

Quality Control

Our Benzenesulfonicacid,2(Or4)-Hydroxy- is produced under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for identity, purity, and impurity profiles. Certificates of Analysis (COA) documenting results for assay, related substances, and other critical parameters are available upon request to support your quality assurance and regulatory 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 after opening to prevent absorption of atmospheric moisture, 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	≤ 1.0%
Residue on Ignition	≤ 0.1%
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 1.5%

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