Description

1,2,3,6-Tetrahydrophthalic Anhydride is a versatile, reactive cyclic anhydride widely used as a key intermediate in polymer synthesis. Its value lies in its ability to introduce reactive sites and modify material properties, making it essential for creating high-performance resins and coatings. This product is primarily needed by manufacturers in the epoxy curing agent, alkyd resin, and plasticizer industries, where it contributes to enhanced durability and chemical resistance.

Application

• Primary intermediate for the synthesis of epoxy resin curing agents and hardeners.
• Building block in the production of alkyd resins for paints and coatings.
• Key raw material for manufacturing specific plasticizers and polyester polyols.
• Intermediate in organic synthesis for pharmaceuticals and agrochemicals.
• Used in the production of corrosion inhibitors and lubricant additives.
• Component in the synthesis of specialty polymers for the electronics industry.

Basic Information

Product Name	1,2,3,6-Tetrahydrophthalic Anhydride
CAS No.	85-43-8
Molecular Formula	C8H8O3
Molecular Weight	152.15 g/mol
Synonyms	1,2,3,6-Tetrahydrophthalic anhydride; 4-Cyclohexene-1,2-dicarboxylic anhydride; δ4-Tetrahydrophthalic anhydride; THPA; 1-Cyclohexene-4,5-dicarboxylic anhydride; 3a,4,7,7a-Tetrahydroisobenzofuran-1,3-dione; NSC 8651
EINECS	201-603-9

Quality Control

Our 1,2,3,6-Tetrahydrophthalic Anhydride is manufactured under a strict quality management system. Every batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity and performance. A comprehensive Certificate of Analysis (COA) detailing assay, impurity profile, and physical properties is provided with each shipment to guarantee consistency and 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). 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 solid
Identification (IR)	Conforms
Assay (HPLC)	≥ 98.0%
Melting Point	97 - 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.