Description

Thpa CAS NO 52858-57-8 is a high-purity chemical intermediate, specifically the anhydride form of tetrahydrophthalic acid. This compound is valued for its versatility as a building block in advanced polymer synthesis and fine chemical manufacturing. It is essential for industries requiring high-performance materials, including epoxy resin curing agents, plasticizers, and specialty coatings.

Application

• As a key monomer in the production of epoxy resin curing agents and hardeners.
• In the synthesis of unsaturated polyester resins (UPR) for reinforced plastics and composites.
• As an intermediate for manufacturing plasticizers and modifiers to enhance polymer flexibility.
• In the formulation of alkyd resins for high-quality industrial and protective coatings.
• As a precursor in fine chemical synthesis for pharmaceuticals and agrochemicals.
• For research and development in polymer chemistry and material science.

Basic Information

Product Name	Thpa CAS NO 52858-57-8
CAS No.	52858-57-8
Molecular Formula	C8H10O3
Molecular Weight	154.16 g/mol
Synonyms	Tetrahydrophthalic Anhydride; 4-Cyclohexene-1,2-dicarboxylic Anhydride; 1,2,3,6-Tetrahydrophthalic Anhydride; THPA; δ4-Tetrahydrophthalic Anhydride; 3a,4,7,7a-Tetrahydroisobenzofuran-1,3-dione; NSC 8655
EINECS	258-182-1

Quality Control

Our Thpa CAS NO 52858-57-8 is manufactured under a stringent quality management system. Every batch undergoes comprehensive analytical testing to ensure it meets the high standards required for industrial and fine chemical applications. Certificates of Analysis (COA) documenting purity, identity, and key physical parameters are available upon request to support 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 (moisture-sensitive) nature, the container must be kept tightly sealed after opening to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline solid
Identification (IR)	Conforms to structure
Assay (HPLC)	≥ 98.0%
Melting Point	98°C - 102°C
Water Content (KF)	≤ 0.5%

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