Hexahydrophthalic Anhydride (HHPA), chemically known as 1,2-Cyclohexanedicarboxylic anhydride and bearing the CAS number 85-42-7, is a white crystalline solid with significant industrial importance. Its molecular formula is C8H10O3, and it possesses a molecular weight of 154.16. As a key intermediate in various chemical processes, understanding its properties and applications is crucial for procurement managers and R&D scientists seeking to leverage its capabilities.

The typical properties of HHPA include a melting point in the range of 32-34°C and a boiling point of 158°C at 17 mm Hg. It presents as a white solid, with a density of approximately 1.18 g/cm³. It is soluble in common organic solvents such as benzene, acetone, and chloroform, but exhibits slight solubility in petroleum ether. HHPA is sensitive to moisture, necessitating appropriate storage conditions in cool, dry, and well-ventilated locations, protected from light and humidity. This moisture sensitivity is an important consideration when planning logistics and handling.

The primary applications of Hexahydrophthalic Anhydride are remarkably diverse, highlighting its versatility. It is widely employed as an epoxy curing agent, contributing to the formation of robust and thermally stable epoxy resins. These resins are vital in the manufacturing of coatings, adhesives, and composite materials where durability and resistance are paramount. Furthermore, HHPA serves as a key component in the synthesis of polyester resins and alkyd resins, which are integral to paints and varnishes. Its role extends to being an intermediate for plasticizers, enhancing the flexibility and processing of polymers like PVC. The compound is also utilized in the formulation of insect repellents and rust inhibitors, showcasing its broad utility across different industrial sectors.

For businesses looking to procure HHPA, identifying a reliable manufacturer is essential. Searches for 'Hexahydrophthalic Anhydride manufacturer' or 'Hexahydrophthalic Anhydride supplier in China' will often yield companies committed to high purity standards, typically ≥99.0%. These manufacturers are equipped with substantial production capacities, often in the range of thousands of tons per year, ensuring a consistent supply chain for global customers. When evaluating potential suppliers, it is advisable to look for those who provide comprehensive product documentation, including Material Safety Data Sheets (MSDS) and Certificates of Analysis (COA), alongside competitive pricing for bulk purchases. Understanding the 'Hexahydrophthalic Anhydride price' in relation to purity and volume will aid in strategic sourcing decisions.

In summary, Hexahydrophthalic Anhydride (CAS 85-42-7) is a fundamental chemical intermediate with a broad spectrum of applications, from high-performance epoxy systems and plasticizers to coatings and specialty chemicals. Its unique properties, coupled with the availability of high-quality products from established manufacturers, make it an indispensable component in numerous industrial processes. For procurement professionals, diligent supplier selection and a clear understanding of HHPA's characteristics are key to successful material sourcing.