What is Phthalic anhydride CAS 85-44-9?
Phthalic anhydride CAS 85-44-9 is an aromatic organic compound produced commercially by oxidation of o‑xylene or naphthalene, serving as a fundamental chemical building block in large‑scale industrial chemistry; it is a precursor for plasticizers, polyester resins, alkyd resins, and many other specialty chemicals that form the basis of coatings, adhesives, and polymers.
Specifications
| Property |
Value |
| Appearance |
A colorless to white lustrous solid |
| Melting Point |
131-134 °C(lit.) |
| Boiling Point |
284 °C(lit.) |
| Density |
1,53 g/cm3 |
| Fp |
152 °C |
| pka |
2.97[at 20 ℃] |
| pH |
2 (6g/l, H2O, 20℃) |
| Storage Conditions |
Store below +30°C. |
Features
- Core Intermediate: Serves as a foundational manufacturing intermediate for diverse downstream chemical products.
- High Industrial Demand: A globally significant feedstock with extensive use in large‑volume chemical production.
- Versatile Precursor: Enables synthesis of plasticizers, resins, dyes, and surface‑active compounds.
- Commercial Scalability: Produced at large scale via established oxidation technology for cost‑effective supply.
Applications
- Plasticizer Production: Used to synthesize phthalate plasticizers such as dioctyl phthalate (DOP) for flexible PVC materials.
- Polyester Resins: Applied in manufacturing unsaturated polyester resins for fiberglass‑reinforced plastics, coatings, and adhesives.
- Alkyd Resins: Used to produce alkyd resins for paints, varnishes, and coatings with durable finishes.
- Dye & Pigment Intermediates: Serves as a feedstock for synthesizing colorants and specialty dyes.
- Pharmaceutical Intermediates: Used in chemical synthesis routes for various pharmaceutical agents.
- Plastic Additives: Basis for production of plastic additives like heat stabilizers and lubricants.
Packaging
Mikem offers flexible packaging options, including 25 kg of fiber drums for liquid products and 15–25 kg PP/PE bags for powder products, all customizable to meet your specific needs.