| Formula / Notation | C8H4O3 |
|---|---|
| CAS Number | 85-44-9 |
| Molecular Weight | 148.11 |
| Melting Point | 267.4 °F (NTP, 1992) |
| Boiling Point | 563 °F at 760 mmHg (sublimes) (NTP, 1992) |
| Density | 1.2 at 275 °F 1.53 at 20 °C (solid) (USCG, 1999) - Denser than water; will sink |
| Solubility | Decomposes (NTP, 1992) |
| Appearance | Phthalic anhydride appears as a colorless to white lustrous solid in the form of needles with a mild distinctive odor. Moderately toxic by inhalation or ingestion and a skin irritant. Melting point... |
| Also Known As | 2-benzofuran-1,3-dione; 85-44-9; 1,3-Isobenzofurandione; 2-Benzofuran-1,3-dione; Phthalandione; Retarder esen; 1,3-Dioxophthalan; 1,3-Phthalandione; Phthalic acid anhydride; Retarder AK |
| Category | Organic Compounds |
What is Phthalic anhydride?
Phthalic anhydride is the cyclic dicarboxylic anhydride that is the anhydride of phthalic acid. It has a role as an allergen. It is a cyclic dicarboxylic anhydride and a member of 2-benzofurans.
Formula & Notation
IUPAC Name: 2-benzofuran-1,3-dione
Other Names / Synonyms: 2-benzofuran-1,3-dione; 85-44-9; 1,3-Isobenzofurandione; 2-Benzofuran-1,3-dione; Phthalandione; Retarder esen; 1,3-Dioxophthalan; 1,3-Phthalandione; Phthalic acid anhydride; Retarder AK
Properties & Characteristics
Physical Data
| Property | Value |
|---|---|
| Melting Point | 267.4 °F (NTP, 1992) |
| Boiling Point | 563 °F at 760 mmHg (sublimes) (NTP, 1992) |
| Density | 1.2 at 275 °F 1.53 at 20 °C (solid) (USCG, 1999) - Denser than water; will sink |
| Molecular Weight | 148.11 |
| Solubility | Decomposes (NTP, 1992) |
| Appearance | Phthalic anhydride appears as a colorless to white lustrous solid in the form of needles with a mild distinctive odor. Moderately toxic by inhalation or ingestion and a skin irritant. Melting point... |
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Phthalic anhydride is the cyclic dicarboxylic anhydride that is the anhydride of phthalic acid. It has a role as an allergen. It is a cyclic dicarboxylic anhydride and a member of 2-benzofurans.
Used as an industrial feedstock, solvent, pharmaceutical intermediate, flavoring agent, or chemical building block.
Flammable or irritant. Many organic compounds are flammable liquids or vapours. Keep away from ignition sources. Consult SDS for specific hazard data.
The formula or notation for Phthalic anhydride is: C8H4O3