Description

5-[Bis(3-Carboxy-4-Hydroxy-5-Methyl-Phenyl)Methyl]-2-Hydroxy-3-Methyl-Benzoic Acid is a high-purity, multifunctional phenolic acid derivative valued for its complex molecular architecture and chelating properties. This compound serves as a critical advanced intermediate in the synthesis of specialized polymers, high-performance antioxidants, and metal-sequestering agents. It is essential for R&D and production in the pharmaceutical, specialty polymer, and fine chemical industries where precise molecular functionality is required.

Application

• Pharmaceutical Intermediate: Key building block for synthesizing novel active pharmaceutical ingredients (APIs) with antioxidant or metal-chelating activity.
• Polymer Additive: Acts as a monomer or stabilizer in the production of high-performance engineering plastics and resins to enhance thermal and oxidative stability.
• Antioxidant Synthesis: Serves as a precursor for manufacturing complex phenolic antioxidants used in lubricants, fuels, and plastics.
• Chelating Agent: Utilized in the formulation of specialty sequestrants for metal ion control in industrial processes and water treatment applications.
• Research & Development: A valuable compound for academic and industrial research in organic synthesis, material science, and medicinal chemistry.
• Fine Chemical Synthesis: Intermediate for creating dyes, pigments, and other complex organic molecules requiring a multi-functional phenolic core.

Basic Information

Item	Details
Product Name	5-[Bis(3-Carboxy-4-Hydroxy-5-Methyl-Phenyl)Methyl]-2-Hydroxy-3-Methyl-Benzoic Acid
CAS No.	129749-43-5
Molecular Formula	C25H22O8
Molecular Weight	450.44 g/mol
Synonyms	2-Hydroxy-3-methyl-5-[bis(3-carboxy-4-hydroxy-5-methylphenyl)methyl]benzoic acid; 3,3'-Methylenebis(6-hydroxy-5-methylisophthalic acid); 5-[Bis(3-carboxy-4-hydroxy-5-methylphenyl)methyl]-2-hydroxy-3-methylbenzoic acid; 129749-43-5; Bis-MPA phenolic derivative; Multifunctional phenolic acid
EINECS	Contact for details

Quality Control

Our 5-[Bis(3-Carboxy-4-Hydroxy-5-Methyl-Phenyl)Methyl]-2-Hydroxy-3-Methyl-Benzoic Acid is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting standards for research and industrial use. A comprehensive Certificate of Analysis (COA) detailing purity, assay, and impurity profiles is provided with each shipment.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at a controlled room temperature (15-25°C). Due to its hygroscopic nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect stability and handling properties.

Specification

Item	Specification
Appearance	White to off-white powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%
Heavy Metals (as Pb)	≤ 10 ppm

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