Description

Potassium 2,5-Dihydroxybenzenesulfonate is a water-soluble potassium salt of a sulfonated dihydroxybenzene derivative, valued for its role as a versatile intermediate and functional additive. Its significance lies in its ability to act as a metal chelating agent, reducing agent, and a building block for more complex organic synthesis. This compound is primarily needed by manufacturers in the pharmaceutical, photographic chemical, and specialty polymer industries.

Application

• Pharmaceutical Intermediate: Used in the synthesis of active pharmaceutical ingredients (APIs), particularly those requiring a sulfonated phenolic moiety.
• Photographic Chemical: Serves as a developing agent or a component in photographic developer solutions due to its reducing properties.
• Polymer & Resin Modifier: Acts as a monomer or additive to introduce sulfonate groups for improved hydrophilicity or ionic character in specialty polymers.
• Metal Chelation & Water Treatment: Utilized as a chelating agent for metal ions in industrial water treatment formulations and cleaning processes.
• Dye & Pigment Intermediate: Functions as a key precursor in the production of certain sulfonated dyes and organic pigments.
• Analytical Reagent: Employed in specific analytical chemistry applications as a standard or reagent.

Basic Information

Product Name	Potassium 2,5-Dihydroxybenzenesulfonate
CAS No.	21799-87-1
Molecular Formula	C6H5KO5S
Molecular Weight	228.27 g/mol
Synonyms	Potassium 2,5-dihydroxybenzenesulfonate; 2,5-Dihydroxybenzenesulfonic acid potassium salt; 1,4-Dihydroxy-3-sulfobenzoic acid potassium salt (tautomeric form); Potassium 1,4-dihydroxy-3-sulfobenzoate; 5-Hydroxy-2-sulfophenol potassium salt; 2,5-Dihydroxyphenylsulfonic acid potassium salt; PDHBS-K; Contact for additional trade names.
EINECS	Contact for details

Quality Control

Our Potassium 2,5-Dihydroxybenzenesulfonate is produced under a strict 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 provided with every shipment to guarantee supply reliability and batch-to-batch consistency for your 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 (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent absorption of atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Water Content (KF)	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition	Contact for details
pH (5% solution)	Contact for details

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