4,5-Dichlorophthalicanhydride, CAS No. 942-06-3

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942-06-3

Catalog No. EBD10991

CAS 942-06-3

Name 4,5-Dichlorophthalicanhydride

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Basic Information

Synonyms: 4,5-Dichlorophthalicanhydride 5,6-dichloro-2-benzofuran-1,3-dione akos92355 5,6-dichloro-1,3-dihydroisobenzofuran-1,3-dione 4,5-dichlorophthalicanhydride98+% 5,6-dichloroisobenzofuran-1,3(1h,3h)-dione 4,5-dichlorophalicanhydride 5,6-dichloroisobenzofuran-1,3-dione 1,3-isobenzofurandione,5,6-dichloro- 5,6-dichloro-1,3-isobenzofurandione phthalicanhydride,4,5-dichloro-(6ci,7ci,8ci) 5,6-dichloro-1,3-dihydro-2-benzofuran-1,3-dione

Molecular Formula: C8H2Cl2O3

Molecular Weight: 217.01

MDL Number: MFCD00075034

Categories: Synthetic Chemistry > Organic Building Blocks > Carboxylic Acids and Esters

Product Description:

4,5-Dichlorophthalic anhydride is an aromatic compound featuring a phthalic anhydride core substituted with chlorine atoms at the 4 and 5 positions. This white to off-white crystalline solid is a key functionalized monomer in polymer chemistry. Its primary and most significant industrial application is as a critical precursor for the synthesis of high-performance polyimides and polyamide-imides. The chlorine substituents provide reactive sites for further functionalization or act as leaving groups in polymerization reactions, enabling the introduction of the rigid, aromatic phthalimide unit into polymer backbones. These resulting polymers exhibit exceptional thermal stability, mechanical strength, and chemical resistance, making them suitable for advanced materials in electronics (e.g., flexible circuit boards, dielectric layers), aerospace, and automotive industries. As a functionalized aromatic anhydride, it also serves as a versatile organic synthesis building block for constructing complex molecules, particularly those requiring a substituted phthalimide or phthalic acid moiety.

Physical Properties

Melting Point: 185-187 °C(lit.)

Boiling Point: 313 °C at 760 mmHg

Flash Point: 144.8 °C

Density: 1.715 g/cm3

Analytical Data

Appearance: Light grey to pale blue powder