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O-Phthalic anhydride is a chemical compound with the chemical formula C8H4O3. It is an organic compound that belongs to the class of compounds called anhydrides. O-Phthalic anhydride is a white, crystalline solid that is soluble in polar solvents such as alcohols and ethers, but insoluble in nonpolar solvents such as hydrocarbons. O-Phthalic Anhydride is an important intermediate in the production of various chemicals, plastics, and industrial materials.
O-phthalic anhydride Formula: C₆H₄(CO)₂
The molecular weight of O-phthalic anhydride: 148.12 g/mol
Topfine Chemical is a trusted and professional supplier of O-Phthalic Anhydride with over 10 years of experience in the chemical industry. Contact us today for more information or to make an inquiry. Our team is ready to assist with product details, pricing, and any technical support you may need.
| Property | Description |
| Name | O-Phthalic Anhydride |
| Molten Chromaticity (Chromaticity Number) | ≤100 |
| Thermal Stability Chromaticity (Chromaticity Number) | ≤150 |
| Chemical Formula of Phthalic Anhydride Molecular Formula | C8h4o3 |
| Crystallizing Point | ≥130.0℃ |
| Purity | ≥99.5% |
| Free Acid Content | ≤0.5% |
| Water Solubility | Insoluble in Cold Water, but Soluble in Hot Water, ethanol, ether, benzene and Other Organic Solvents |
| Property | Description |
| Chemical Formula | C₆H₄(CO)₂O |
| Molecular Weight | 148.12 g/mol |
| Appearance | White crystalline solid or powder, white with Other Colors of Scaly or Crystalline Powder |
| Melting Point | 131–132°C |
| Boiling Point | 295°C (decomposes) |
| Density | 1.535 g/cm³ |
| Solubility | Slightly soluble in water, more soluble in hot water; soluble in organic solvents (e.g., alcohol, acetone) |
| Vapor Pressure | 0.01 mmHg (at 25°C) |
| Reactivity | Reacts with water to form phthalic acid; undergoes electrophilic aromatic substitution |
| Safety | Harmful by inhalation, ingestion, or skin contact; irritant to eyes, skin, and respiratory system |
| Hazard Classification | Hazardous: Combustible solid, can cause severe burns or damage in contact with water |
O-phthalic anhydride is a versatile chemical compound with a wide range of industrial and commercial applications. Its primary uses include：
Plasticizers: It is a key component in the production of phthalate esters, which are used to soften plastics (e.g., PVC).
Dyes and Pigments: It serves as a precursor for the synthesis of various dyes and pigments.
Polymer Resins: As a kind of coating additives, it is used in the production of alkyd resins, which are important for coatings and paints.
Pharmaceuticals and Agrochemicals: It is involved in the synthesis of some pharmaceutical compounds and pesticides.
O-phthalic anhydride plays a key role in industries like plastics, coatings, chemicals, and pharmaceuticals.
Topfine Chemical is a leading manufacturer and supplier of O-Phthalic Anhydride. We specialize in providing high-quality O-Phthalic Anhydride to meet the needs of various applications. Our extensive expertise and commitment to quality ensure that our products meet the highest standards for performance and reliability. Contact us now!
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