3,4-2H-Isocoumarin-3-one
Homophthalic anhydride
CAS: 703-59-3
Molecular Formula: C9H6O3
3,4-2H-Isocoumarin-3-one - Names and Identifiers
| Name | Homophthalic anhydride |
| Synonyms | 1,3-Isochromandione 1,3-ISOCHROMANDIONE HOMOPHTHALIC ANHYDRIDE Homophthalic anhydride benzoglutaric anhydride 3,4-2H-Isocoumarin-3-one HOMOPHTHALIC ACID ANHYDRIDE 1H-isochromene-1,3(4H)-dione 1H-Isochromene-1,3(4H)-dione 1H-2-Benzopyran-1,3(4H)-dione 2-CARBOXYPHENYLACETIC ANHYDRIDE o-Carboxyphenylacetic acid cyclic anhydride~1,3-Isochromanedione |
| CAS | 703-59-3 |
| EINECS | 211-873-4 |
| InChI | InChI=1/C9H6O3/c10-8-5-6-3-1-2-4-7(6)9(11)12-8/h1-4H,5H2 |
3,4-2H-Isocoumarin-3-one - Physico-chemical Properties
| Molecular Formula | C9H6O3 |
| Molar Mass | 162.14 |
| Density | 1.2599 (rough estimate) |
| Melting Point | 140-142°C(lit.) |
| Boling Point | 161°C/1.5mmHg(lit.) |
| Flash Point | 159°C |
| Water Solubility | Decomposes in water. |
| Vapor Presure | 0.000244mmHg at 25°C |
| Appearance | Powder |
| Color | Slightly yellow to beige |
| BRN | 5244 |
| Storage Condition | 2-8°C |
| Sensitive | Moisture Sensitive |
| Refractive Index | 1.5380 (estimate) |
| MDL | MFCD00006894 |
3,4-2H-Isocoumarin-3-one - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36 - Wear suitable protective clothing. |
| WGK Germany | 3 |
| FLUKA BRAND F CODES | 10-21 |
| HS Code | 29173995 |
3,4-2H-Isocoumarin-3-one - Introduction
Homophthalic anhydride, chemical formula C10H6O3, is an organic compound. The following is a description of the nature, use, preparation and safety information of Homophthalic anhydride:
Nature:
- Homophthalic anhydride is a white crystalline solid with a special aromatic odor.
-It is soluble in organic solvents such as ether and alcohol, but almost insoluble in water.
-Relatively stable in air, but with a low melting point (about 48°C), it will decompose when heated.
Use:
- Homophthalic anhydride is an important raw material for organic synthesis, which is widely used in the fields of drugs, dyes, resins, coatings and plastics.
-It can be used as a precursor of dyes, for example, for the synthesis of dyes such as anthraquinone orange.
- Homophthalic anhydride can also be used to synthesize polymer compounds containing phthalic anhydride ester bonds, such as synthetic cellulose esters.
Preparation Method:
-The common preparation method of Homophthalic anhydride is obtained by the thermal condensation reaction of hydroquinone and phthalic anhydride.
-In the reaction, dihydroxybenzene and phthalic anhydride are dehydrated at high temperature to form Homophthalic anhydride.
Safety Information:
- Homophthalic anhydride has a certain degree of irritation to the human body, and contact may cause eye and skin irritation.
-Wear appropriate protective equipment such as gloves, goggles and protective clothing during use.
-When storing and handling Homophthalic anhydride, avoid contact with strong oxidants and acidic substances to avoid dangerous reactions.
Nature:
- Homophthalic anhydride is a white crystalline solid with a special aromatic odor.
-It is soluble in organic solvents such as ether and alcohol, but almost insoluble in water.
-Relatively stable in air, but with a low melting point (about 48°C), it will decompose when heated.
Use:
- Homophthalic anhydride is an important raw material for organic synthesis, which is widely used in the fields of drugs, dyes, resins, coatings and plastics.
-It can be used as a precursor of dyes, for example, for the synthesis of dyes such as anthraquinone orange.
- Homophthalic anhydride can also be used to synthesize polymer compounds containing phthalic anhydride ester bonds, such as synthetic cellulose esters.
Preparation Method:
-The common preparation method of Homophthalic anhydride is obtained by the thermal condensation reaction of hydroquinone and phthalic anhydride.
-In the reaction, dihydroxybenzene and phthalic anhydride are dehydrated at high temperature to form Homophthalic anhydride.
Safety Information:
- Homophthalic anhydride has a certain degree of irritation to the human body, and contact may cause eye and skin irritation.
-Wear appropriate protective equipment such as gloves, goggles and protective clothing during use.
-When storing and handling Homophthalic anhydride, avoid contact with strong oxidants and acidic substances to avoid dangerous reactions.
Last Update：2024-04-09 02:00:47
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