Description

Diphenolic Acid CAS NO 126-00-1 is a high-purity phenolic compound, also known as 4,4-Bis(4-hydroxyphenyl)pentanoic acid, valued for its role as a versatile chemical intermediate. Its bifunctional structure, featuring both phenolic hydroxyl and carboxylic acid groups, makes it a critical building block for synthesizing advanced polymers and specialty chemicals. This product is essential for manufacturers in the polymer, resin, and fine chemical industries seeking to develop materials with enhanced thermal stability and mechanical properties.

Application

• Epoxy Resin Modifier: Used to synthesize novel epoxy resins and hardeners, improving flexibility, adhesion, and thermal resistance in coatings and composites.
• Polycarbonate & Polyester Precursor: Serves as a monomer or chain extender in the production of engineering plastics, contributing to high-performance materials.
• Pharmaceutical Intermediate: Employed in the synthesis of certain active pharmaceutical ingredients (APIs) and drug delivery systems.
• UV Stabilizer & Antioxidant Synthesis: Acts as a key intermediate for manufacturing additives that protect polymers from degradation.
• Adhesive & Sealant Formulations: Enhances the performance characteristics of high-strength industrial adhesives.
• Dye & Pigment Intermediate: Used in the production of specialized colorants and photographic chemicals.

Basic Information

Product Name	Diphenolic Acid
CAS No.	126-00-1
Molecular Formula	C₁₇H₁₈O₄
Molecular Weight	286.32 g/mol
Synonyms	4,4-Bis(4-hydroxyphenyl)pentanoic acid; DPA; 4,4-Bis(p-hydroxyphenyl)valeric acid; 4-(4-Hydroxyphenyl)-4-(4-hydroxyphenyl)pentanoic acid; Bis(4-hydroxyphenyl)pentanoic acid; 4,4'-(1-Ethylpropylidene)diphenol-ω-carboxylic acid; NSC 122044
EINECS	204-762-9

Quality Control

Our Diphenolic Acid is manufactured under a strict quality management system. Every batch undergoes comprehensive analytical testing, including HPLC for purity and identity confirmation, to ensure it meets exacting standards for industrial and fine chemical applications. A Certificate of Analysis (COA) detailing all specifications is provided with each shipment to guarantee traceability and consistency.

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). Keep away from strong oxidizing agents, strong bases, and heat sources. The product may be hygroscopic; ensure containers are sealed after use to minimize moisture absorption.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	168 - 172 °C
Loss on Drying	≤ 0.5%
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.