Description

4-Hydroxy-3,5-Dimethylbenzoic Acid is a substituted benzoic acid derivative that serves as a versatile synthetic intermediate and building block in organic chemistry. Its molecular structure, featuring both phenolic and carboxylic acid functional groups, makes it valuable for the synthesis of more complex molecules, including pharmaceuticals, agrochemicals, and specialty polymers. This compound is particularly relevant for R&D chemists and production specialists in the fine chemical, pharmaceutical, and material science industries seeking high-purity intermediates for advanced synthesis.

Application

• Pharmaceutical Intermediate: Key building block in the synthesis of active pharmaceutical ingredients (APIs), particularly those requiring a sterically hindered phenolic acid moiety.
• Agrochemical Synthesis: Used in the production of herbicides, fungicides, and plant growth regulators where its structure contributes to biological activity.
• Polymer Chemistry: Acts as a monomer or modifier in the production of specialty polymers, such as liquid crystal polymers (LCPs) and high-performance resins.
• Dye and Pigment Manufacturing: Serves as a precursor for the synthesis of organic dyes, pigments, and UV stabilizers.
• Research & Development: A valuable reagent in academic and industrial R&D for exploring new chemical entities and reaction pathways.
• Coordination Chemistry: Can function as a ligand for metal complexes in catalytic and material applications.

Basic Information

Product Name	4-Hydroxy-3,5-Dimethylbenzoic Acid
CAS No.	4919-37-3
Molecular Formula	C9H10O3
Molecular Weight	166.17 g/mol
Synonyms	3,5-Dimethyl-4-hydroxybenzoic Acid; 4-Hydroxy-3,5-dimethylbenzoic Acid; 2,6-Dimethyl-4-carboxyphenol; 3,5-Xylenol-4-carboxylic Acid; 4-Carboxy-2,6-dimethylphenol; Benzoic acid, 4-hydroxy-3,5-dimethyl-; 2,6-Dimethyl-4-hydroxybenzoic Acid
EINECS	225-548-9

Quality Control

Our 4-Hydroxy-3,5-Dimethylbenzoic Acid is manufactured under a strict quality management system. Each batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications. Certificates of Analysis (COA) documenting all critical parameters are provided and available upon request, supporting compliance in regulated applications.

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.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	215 - 220 °C
Loss on Drying	≤ 1.0%
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.