4,5-Dichlorophalic anhydride

4,5-Dichlorophalic anhydride - Names and Identifiers

Name	4,5-dichlorophthalic anhydride
Synonyms	4,5-Dichlorophalic anhydride 4,5-Dichlorophthalic anhydride 4,5-dichlorophthalic anhydride 4,5-DICHLOROPHTHALIC ANHYDRIDE 5,6-Dichloro-2-benzofuran-1,3-dione 5,6-dichloro-2-benzofuran-1,3-dione 5,6-Dichloroisobenzofuran-1,3-dione 5,6-Dichloroisobenzofuran-1,3(1H,3H)-dione 5,6-DICHLORO-1,3-DIHYDROISOBENZOFURAN-1,3-DIONE
CAS	942-06-3
EINECS	213-386-2
InChI	InChI=1/C8H2Cl2O3/c9-5-1-3-4(2-6(5)10)8(12)13-7(3)11/h1-2H
InChIKey	ULSOWUBMELTORB-UHFFFAOYSA-N

4,5-Dichlorophalic anhydride - Physico-chemical Properties

Molecular Formula	C8H2Cl2O3
Molar Mass	217.01
Density	1.5974 (estimate)
Melting Point	185-187°C(lit.)
Boling Point	313°C(lit.)
Flash Point	144.8°C
Solubility	Chloroform (Slightly)
Vapor Presure	0.00051mmHg at 25°C
Appearance	Powder
Color	Light gray to pale blue
Storage Condition	Inert atmosphere,Store in freezer, under -20°C
Stability	Moisture Sensitive
Refractive Index	1.638
MDL	MFCD00075034

4,5-Dichlorophalic anhydride - 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. S37/39 - Wear suitable gloves and eye/face protection
WGK Germany	3
HS Code	29173995

4,5-Dichlorophalic anhydride - Introduction

4,5-dichlorophthalic anhydride is an organic compound with the chemical formula C8H2Cl2O3. The following is a description of its nature, use, preparation and safety information:

Nature:
-Appearance: 4,5-dichlorophthalic anhydride is a colorless to pale yellow crystalline solid.
-Melting point: about 137-140 degrees Celsius.
-Stability: It is relatively stable at room temperature, but it is easy to decompose under high temperature, direct sunlight or humid heat conditions.
-Solubility: It is soluble in organic solvents (such as ethers, alcohols and chlorinated hydrocarbons), but almost insoluble in water.

Use:
- 4,5-dichlorophthalic anhydride are mainly used as drug intermediates and dye intermediates.
-It can also be used for the synthesis of high-performance engineering plastics such as polyimide resin, imide resin, and polyamide acid resin.

Method:
-The preparation of 4,5-dichlorophthalic anhydride is usually obtained by the anhydride reaction of 4,5-dichlorophenol. The reaction is usually carried out using an acidic catalyst and under appropriate conditions of temperature and time.

Safety Information:
- 4,5-dichlorophthalic anhydride may be irritating to the eyes, skin and respiratory tract, so care should be taken to avoid direct contact during operation.
-It should be stored in a sealed container, away from fire sources and open flames.
-In use, storage and handling, should follow the relevant safety procedures and protective measures, and ensure good ventilation conditions.

Please note that the above information is for reference only. In the specific application, the operation should be carried out according to the specific situation and relevant laws and regulations, and the opinions of professionals should be consulted.

Last Update：2024-04-09 20:49:11