Description

Endoxo-Delta(4)-Tetrahydrophthalic Acid is a specialized, high-purity chemical intermediate with a unique bicyclic structure. This compound is valued for its reactivity and serves as a critical building block in advanced organic synthesis, enabling the production of complex molecules. It is primarily sought by research institutions and industrial manufacturers in the pharmaceutical, agrochemical, and specialty polymer sectors for developing novel active ingredients and functional materials.

Application

• Pharmaceutical Intermediate: A key precursor in the synthesis of complex drug molecules and active pharmaceutical ingredients (APIs), particularly for compounds requiring a rigid, functionalized bicyclic framework.
• Agrochemical Synthesis: Used in the research and production of advanced herbicides, fungicides, and plant growth regulators.
• Specialty Polymer & Resin Production: Serves as a monomer or cross-linking agent for creating high-performance polymers with specific thermal or mechanical properties.
• Fine Chemical Manufacturing: Employed as a versatile building block for synthesizing dyes, pigments, and other high-value specialty chemicals.
• Academic & Industrial R&D: A valuable reagent for methodological development and exploring new synthetic pathways in organic chemistry laboratories.

Basic Information

Product Name	Endoxo-Delta(4)-Tetrahydrophthalic Acid
CAS No.	51112-81-3
Molecular Formula	C8H10O4
Molecular Weight	170.16 g/mol
Synonyms	4,7-Endoxoisobenzofuran-1,3-dione, 3a,4,7,7a-tetrahydro-; 4,7-Epoxyisobenzofuran-1,3-dione, 3a,4,7,7a-tetrahydro-; 3a,4,7,7a-Tetrahydro-4,7-epoxyisobenzofuran-1,3-dione; 1,3-Dioxo-1,3,3a,4,7,7a-hexahydro-4,7-epoxyisobenzofuran; 4,7-Epoxyhexahydrophthalic anhydride; endo-3,6-Epoxy-δ⁴-tetrahydrophthalic anhydride; endo-Bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic anhydride (related structure).
EINECS	Contact for details

Quality Control

Our Endoxo-Delta(4)-Tetrahydrophthalic Acid is manufactured under strict quality management systems. Each batch undergoes rigorous analytical testing, including HPLC for purity and identity confirmation, to ensure it meets precise customer specifications and high industry standards. Certificates of Analysis (COA) documenting all critical parameters are available upon request.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area at controlled room temperature (15-25°C). This product is hygroscopic (moisture-sensitive); containers must be kept tightly sealed to prevent degradation from atmospheric moisture.

Specification

Item	Specification
Appearance	White to off-white crystalline powder
Identification (IR)	Conforms to reference spectrum
Assay (HPLC)	≥ 98.0%
Loss on Drying	≤ 1.0%
Residue on Ignition	≤ 0.1%
Related Substances (HPLC)	Individual impurity ≤ 0.5%; Total impurities ≤ 2.0%

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