Names
Preferred IUPAC name: 2-Benzofuran-1,3-dione
Other names
Isobenzofuran-1,3-dione
Phthalic anhydride
Identifiers
CAS Number: 85-44-9
JSmol: Interactive image
ChEBI: CHEBI:36605
ChEMBL: ChEMBL1371297
ChemSpider: 6552
ECHA InfoCard: 100.001.461
RTECS number: TI3150000
Properties
Chemical formula: CHO843
Molar mass: 148.1 g/mol
Appearance: white flakes
Odor: characteristic, acrid
Density: 1.53 g/cm, solid; 1.20 g/mL, molten3
Melting point: 131.6 °C (268.9 °F; 404.8 K)
Boiling point: 295 °C (563 °F; 568 K) sublimates
Solubility in water: 0.62 g/100g (20—25 °C);
19.0 g/100g (100 °C);
reacts slowly
Vapor pressure: 0.0015 mmHg (20°C)
Magnetic susceptibility: -67.31·10 cm/mol−63
Hazards
R-phrases: R22 R37/38 R41 R42/43
S-phrases: (S2) S23 S24/25 S26 S37/39 S46
NFPA 704:
Flash point: 152 °C (306 °F; 425 K)
Explosive limits: 1.7%-10.5%
LD
median dose: 4020 mg/kg (oral, rat)
1520 mg/kg (oral, mouse)
800 mg/kg (oral, cat)
800-1600 mg/kg (oral, rat)
2210 mg/kg (oral, mouse)
NIOSH
PEL: TWA 12 mg/m (2 ppm)3
REL: TWA 6 mg/m (1 ppm)3
IDLH: 60 mg/m3
Related compounds
Related compounds: Phthalic acid
Except where otherwise noted, data are given for materials in their(at 25 °C [77 °F], 100 kPa).Except where otherwise noted, data are given for materials in their(at 25 °C [77 °F], 100 kPa).
Infobox references