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Phthalic anhydride (C8H4O3)

Phthalic Anhydride (C8H4O3; CAS 85-44-9) is a practical retrosynthesis target. Phthalic Anhydride presents a C8 framework. Open AI route search in one click below.

Target
Phthalic anhydride
CAS
85-44-9
Formula
C8H4O3
Approx. MW
148.12
SMILES
O=C1OC(=O)c2ccccc21
PubChem CID
6811
Approx. carbons
C8

Phthalic anhydride structure

Properties

IUPAC name
2-benzofuran-1,3-dione
Common names
PHTHALIC ANHYDRIDE; 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
Molecular weight
148.11
Exact mass
148.02
InChIKey
LGRFSURHDFAFJT-UHFFFAOYSA-N
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

View on PubChem

Phthalic anhydride 1H / 13C NMR spectrum →

FAQ

What is the chemical formula of Phthalic anhydride?

Phthalic anhydride has molecular formula C8H4O3. Molecular weight about 148.12 g·mol⁻¹.

What is the CAS number of Phthalic anhydride?

The CAS Registry Number for Phthalic anhydride is 85-44-9.

Run AI retrosynthesis for Phthalic anhydride Target catalog AI tools overview

One click loads Phthalic anhydride into ChemicalTool Reaction for route exploration.

References & tools