Description

3,3'-Dihydroxy-4,4'-Diaminodiphenylmethane is a high-purity aromatic diamine derivative, also known as a methylene-bridged bisphenol derivative. This compound is a critical intermediate valued for its dual amine and phenolic functional groups, enabling its use in the synthesis of advanced polymers and specialty chemicals. It is essential for manufacturers in the epoxy resin, polyurethane, and high-performance adhesive industries seeking to enhance thermal stability and mechanical properties.

Application

• Epoxy Resin Curing Agent & Hardener: Imparts excellent thermal and chemical resistance to cured epoxy systems for coatings, composites, and electrical laminates.
• Polyurethane Chain Extender & Crosslinker: Used to modify and enhance the mechanical properties, such as tensile strength and heat deflection temperature, of polyurethane elastomers and foams.
• High-Performance Polymer Intermediate: Serves as a key monomer in the production of polybenzoxazines, polyimides, and other engineering plastics.
• Dye and Pigment Synthesis: Acts as a precursor in the manufacture of complex organic dyes and pigments, particularly azo dyes.
• Corrosion Inhibitor Formulations: Incorporated into protective coatings and additives for metal surface treatment.
• Adhesive and Sealant Systems: Enhances the performance and durability of structural adhesives used in automotive and aerospace applications.

Basic Information

Product Name	3,3'-Dihydroxy-4,4'-Diaminodiphenylmethane
CAS No.	22428-30-4
Molecular Formula	C13H14N2O2
Molecular Weight	230.26 g/mol
Synonyms	4,4'-Methylenebis(2-aminophenol); Bis(3-hydroxy-4-aminophenyl)methane; DADPM; MDA derivative; 3,3'-Dihydroxybenzidine methane; 4,4'-Diamino-3,3'-dihydroxydiphenylmethane; 2,2'-Dihydroxy-5,5'-diaminodiphenylmethane; Methylene bis(2-aminophenol)
EINECS	Contact for details

Quality Control

Our 3,3'-Dihydroxy-4,4'-Diaminodiphenylmethane is manufactured under a strict quality management system. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise specifications for industrial and advanced applications. A Certificate of Analysis (COA) detailing all quality parameters is provided with every shipment to guarantee traceability and compliance.

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 light-sensitive and easily oxidized nature, it is recommended to store the product under an inert atmosphere (e.g., nitrogen) for long-term preservation and to minimize degradation. Keep away from strong oxidizing agents.

Specification

Item	Specification
Appearance	Light brown to brown crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Melting Point	155 - 165 °C
Loss on Drying	≤ 1.0%
Heavy Metals (as Pb)	≤ 20 ppm

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