Description

Hexahydrophthalic Anhydride is a saturated, alicyclic dicarboxylic acid anhydride widely used as a versatile chemical intermediate. Its fully hydrogenated structure provides excellent thermal and oxidative stability, making it a valuable building block for high-performance polymers and coatings. This compound is essential for manufacturers in the epoxy resin, plasticizer, and specialty chemical industries seeking to enhance product durability and performance.

Application

• Epoxy Resin Curing Agent: A key component for curing epoxy resins, imparting excellent chemical resistance, thermal stability, and low color to coatings, adhesives, and composites.
• Polyester Resin Intermediate: Used in the synthesis of saturated polyester resins for powder coatings, coil coatings, and other high-durability surface finishes.
• Plasticizer Production: Serves as a precursor for the manufacture of specialty plasticizers, offering improved low-temperature flexibility and migration resistance in PVC and other polymers.
• Alkyd Resin Modification: Incorporated into alkyd resins to improve color retention, weathering resistance, and drying properties in industrial paints and varnishes.
• Corrosion Inhibitor Intermediate: Used in the synthesis of chemicals that function as effective corrosion inhibitors in lubricants and metalworking fluids.
• Pharmaceutical & Agrochemical Synthesis: An important intermediate in the production of certain active pharmaceutical ingredients (APIs) and agrochemicals.

Basic Information

Product Name	Hexahydrophthalic Anhydride
CAS No.	85-42-7
Molecular Formula	C8H10O3
Molecular Weight	154.16 g/mol
Synonyms	1,2-Cyclohexanedicarboxylic Anhydride; HHPA; Hexahydro-1,3-isobenzofurandione; Cyclohexane-1,2-dicarboxylic Anhydride; 4-Cyclohexene-1,2-dicarboxylic Anhydride, Hexahydro-; Hexahydro-2-benzofuran-1,3-dione; NSC 9097
EINECS	201-604-9

Quality Control

Our Hexahydrophthalic Anhydride is manufactured under a stringent quality management system. Each batch undergoes rigorous analytical testing to ensure it meets precise specifications for purity, acidity, and color. A Certificate of Analysis (COA) detailing the results is provided with every shipment to guarantee traceability and batch-to-batch consistency for your production processes.

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) and must be kept in original packaging or a moisture-proof container to prevent hydrolysis and degradation. Keep away from strong bases, amines, and oxidizing agents.

Specification

Item	Specification
Appearance	White to off-white crystalline solid
Identification (IR)	Conforms
Assay (GC or Titration)	≥ 99.0 %
Melting Point	32 - 35 °C
Color (APHA)	≤ 50
Acidity (as HHPA)	≤ 0.5 %
Water Content (KF)	≤ 0.1 %

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