Description

p-Salicylic Acid (CAS NO 99-96-7) is a high-purity positional isomer of salicylic acid, serving as a critical pharmaceutical intermediate and fine chemical building block. Its distinct para-substituted phenolic structure offers unique reactivity and properties compared to the more common ortho-isomer, enabling specialized synthesis pathways. This compound is essential for manufacturers in the pharmaceutical, agrochemical, and specialty chemical sectors seeking precise molecular frameworks for advanced product development.

Application

• Pharmaceutical Intermediate: Key starting material for the synthesis of specific drug molecules, including certain analgesics, antiseptics, and other para-substituted aromatic compounds.
• Agrochemical Synthesis: Used in the production of specialized herbicides, fungicides, and plant growth regulators where the para-hydroxybenzoic acid moiety is required.
• Dye & Pigment Manufacturing: Acts as a coupling agent and intermediate in the synthesis of azo dyes and other complex colorants.
• Fine Chemical Production: Serves as a versatile building block for organic synthesis, including the preparation of liquid crystals, UV absorbers, and polymer additives.
• Research & Development: Utilized in academic and industrial R&D laboratories for chemical studies, method development, and as a reference standard.

Basic Information

Product Name	p-Salicylic Acid
CAS No.	99-96-7
Molecular Formula	C7H6O3
Molecular Weight	138.12 g/mol
Synonyms	4-Hydroxybenzoic Acid; Para-Hydroxybenzoic Acid; PHBA; p-Hydroxybenzoic Acid; 4-Carboxyphenol; Benzoic acid, 4-hydroxy-; Kyselina 4-hydroxybenzoova
EINECS	202-804-9

Quality Control

Our p-Salicylic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for identity, purity, and impurity profiles. We provide Certificates of Analysis (COA) with full traceability, and our quality systems support compliance with cGMP, ISO, and other relevant regulatory frameworks for industrial and pharmaceutical intermediates.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, well-ventilated area at controlled room temperature (15-25°C). Keep away from strong oxidizing agents, strong bases, and sources of ignition.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.5%
Melting Point	214 - 217 °C
Loss on Drying	≤ 0.5%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 20 ppm

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