Product Information
Phthalic anhydride (PA), CAS number 85-44-9, also known as benzene anhydride, is a white crystalline powder or flake-like solid with the molecular formula C₈H₄O₃. It is an important aromatic acid anhydride compound, characterized by its easy sublimation, pungent odor, and high chemical reactivity. It is readily soluble in organic solvents and slightly soluble in cold water. It is widely used in chemical, plastics, coatings, and pharmaceutical industries, and is a key industrial intermediate.
Product Description
| Chemical formula | C8H4O3 |
| Molecular weight | 148.116 |
| CAS | 85-44-9 |
| EINECS | 201-607-5 |
| Appearance | White crystalline powder |
COA
|
Item |
Standard |
Result |
|
Appearance |
white needle shaped crystals or flake-shaped crystals |
white needle shaped crystals |
|
Fused chroma(chroma No.) |
≤20 |
10 |
|
Chroma of therma stablity(chroma No.) |
≤50 |
30 |
|
Chroma of sulphuric acid |
≤40 |
30 |
|
Free acid (Mass fraction)% |
≤0.2 |
0.025 |
|
Purity % |
≥99.5% |
99. 96% |
Uses and Applications
- Plastics Industry: Used as a core raw material to synthesize phthalate plasticizers, suitable for PVC plastic processing, improving the flexibility and plasticity of plastics, and widely used in products such as pipes, films, and toys.
- Chemical and Coatings Industry: Used in the synthesis of alkyd resins and unsaturated polyester resins. These resins are key raw materials for coatings, adhesives, and fiberglass products, improving product weather resistance and adhesion.
- Pharmaceutical and Dye Industry: Used as an intermediate in drug synthesis, for the preparation of antibiotics, anti-epileptic drugs, etc.; it can also be used to synthesize various dyes and pigments, meeting the needs of the textile and printing industries.
- Other Fields: Used as an additive in the production of food packaging materials (strictly complying with national standards); used as a laboratory chemical reagent; and can also be used in the synthesis of surfactants, fragrances, and other products.
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