Description

Potassium p-Hydroxybenzenesulphonate is a versatile organic salt widely used as a key intermediate in fine chemical synthesis. Its primary value lies in its role as a sulfonating agent and building block for more complex molecules, particularly in the pharmaceutical and agrochemical sectors. This compound is essential for manufacturers requiring a reliable and high-purity source for producing dyes, UV absorbers, and specialty polymers.

Application

• Pharmaceutical Intermediate: A crucial building block in the synthesis of active pharmaceutical ingredients (APIs), particularly for sulfonamide-based drugs.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and other crop protection agents where the sulfonate group is required.
• Dye and Pigment Manufacturing: Serves as an intermediate for creating sulfonated azo dyes and other colorants with enhanced water solubility.
• UV Stabilizer Production: A key precursor in the manufacture of benzophenone and other organic compounds used as UV absorbers in plastics and coatings.
• Polymer Modification: Employed to introduce sulfonate groups into polymer chains, improving hydrophilicity and ion-exchange properties.
• Electroplating Additives: Used in specialty electroplating baths as a brightening agent or conductivity salt.
• Research & Development: A valuable reagent in organic chemistry research for introducing the p-hydroxybenzenesulfonate moiety.

Basic Information

Item	Details
Product Name	Potassium p-Hydroxybenzenesulphonate
CAS No.	30145-40-5
Molecular Formula	C6H5KO4S
Molecular Weight	212.27 g/mol
Synonyms	Potassium 4-Hydroxybenzenesulfonate; 4-Hydroxybenzenesulfonic Acid Potassium Salt; Phenol-4-sulfonic Acid Potassium Salt; p-Phenolsulfonic Acid Potassium Salt; Potassium Phenol-4-sulfonate; Potassium 4-Phenolsulphonate; Benzenesulfonic Acid, 4-Hydroxy-, Potassium Salt (1:1); Kalium-4-hydroxybenzolsulfonat
EINECS	250-073-5

Quality Control

Our Potassium p-Hydroxybenzenesulphonate is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets the required specifications for purity, identity, and impurity profiles. Certificates of Analysis (COA) documenting results for assay, related substances, residual solvents, and other critical parameters are provided with every shipment to guarantee traceability and batch-to-batch consistency.

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 after opening 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 to standard
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 2.0%
Heavy Metals (as Pb)	≤ 20 ppm
Residue on Ignition (Sulfated Ash)	≤ 0.1%
Related Substances (HPLC)	Total impurities ≤ 2.0%
Solubility (1% in Water)	Clear, colorless solution

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