Description

3,4,5,6-Tetrahydrophthalic Acid is a versatile, partially hydrogenated derivative of phthalic acid, serving as a key intermediate in the synthesis of advanced polymers and fine chemicals. Its unique cyclohexene ring structure provides a reactive platform for creating high-performance materials with tailored properties. This compound is essential for manufacturers in the polymer, resin, and specialty chemical industries seeking to develop products with enhanced stability and specific functional characteristics.

Application

• Polymer & Resin Intermediate: A crucial building block for unsaturated polyester resins (UPRs) and alkyd resins, contributing to improved flexibility and chemical resistance in the final products.
• Epoxy Curing Agent Modifier: Used in the production of modified amine or anhydride curing agents for epoxy systems, influencing cure speed and final material properties.
• Plasticizer & Stabilizer Synthesis: Acts as a precursor in the manufacture of specialty plasticizers and stabilizers for PVC and other polymers.
• Fine Chemical & Pharmaceutical Intermediate: Employed in organic synthesis routes for creating complex molecules, including potential pharmaceutical intermediates and agrochemicals.
• Coating & Adhesive Formulations: Imparts specific performance characteristics, such as adhesion and durability, in high-performance coating and adhesive systems.
• Research & Development: Serves as a valuable reagent in chemical R&D for exploring new synthetic pathways and material science applications.

Basic Information

Product Name	3,4,5,6-Tetrahydrophthalic Acid
CAS No.	635-08-5
Molecular Formula	C8H10O4
Molecular Weight	170.16 g/mol
Synonyms	1,2-Cyclohexenedicarboxylic Acid; 4-Cyclohexene-1,2-dicarboxylic Acid; Tetrahydrophthalic Acid; THPA; 3,4,5,6-Tetrahydro-1,2-benzenedicarboxylic Acid; delta4-Tetrahydrophthalic Acid; 1,2,3,6-Tetrahydrophthalic Acid
EINECS	211-235-8

Quality Control

Our 3,4,5,6-Tetrahydrophthalic Acid is produced under a stringent quality management system. Each batch undergoes comprehensive analytical testing to ensure it meets precise specifications for purity, identity, and physical properties. A Certificate of Analysis (COA) detailing the results is provided with every shipment, ensuring full traceability and compliance with your quality assurance protocols.

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 nature, the container must be kept tightly sealed to prevent moisture absorption, which can affect product quality. Keep away from incompatible materials such as strong bases and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Melting Point	160 - 165 °C
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%

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