320064

Phthalic anhydride

ACS reagent, ≥99%

• Synonym(s): 1,2-Benzenedicarboxylic anhydride, 1,3-Isobenzofurandione, Phthalic acid anhydride
• Empirical Formula (Hill Notation): C₈H₄O₃
• CAS Number: 85-44-9
• Molecular Weight: 148.12
• Beilstein/REAXYS Number: 118515
• EC Number: 201-607-5
• MDL number: MFCD00005918
• UNSPSC Code: 12352100
• PubChem Substance ID: 24859242
• NACRES: NA.21

Properties

• grade: ACS reagent
• Quality Level: 200
• vapor density: 5.1 (vs air)
• vapor pressure: <0.01 mmHg ( 20 °C)
• assay: ≥99%; 99.0-100.2%
• form: flakes
• autoignition temp.: 1058 °F
• expl. lim.: 10.4 %
• ign. residue: ≤0.01%
• bp: 284 °C (lit.)
• mp: 131-134 °C (lit.)
• anion traces: chloride (Cl^-): ≤0.002%; sulfate (SO₄^2-): ≤0.003%
• cation traces: Fe: ≤5 ppm; heavy metals: ≤5 ppm (by ICP)
• SMILES string: O=C1OC(=O)c2ccccc12
• InChI: 1S/C8H4O3/c9-7-5-3-1-2-4-6(5)8(10)11-7/h1-4H
• InChI key: LGRFSURHDFAFJT-UHFFFAOYSA-N

Description

General description

Phthalic anhydride is an anhydride of phthalic acid and a key intermediate in the production of plasticizers, dyes, polyesters resins, modifiers for rubber, and polymers.

Application

Phthalic anhydride may be used as a reactant in the preparation of N-substituted phthalimides, poly(isothianaphthene) and methyl (S)-2-phthalimido-4-methylthiobutanoate.

Other Notes

Go to Redi-Dri^™Product Listing 797995

Legal Information

Redi-Dri is a trademark of Sigma-Aldrich Co. LLC

Safety Information

• pictograms: GHS08,GHS05,GHS07
• signalword: Danger
• hcodes: H302,H315,H317,H318,H334,H335
• pcodes: P261 - P264 - P280 - P301 + P312 - P302 + P352 - P305 + P351 + P338
• Hazard Classifications: Acute Tox. 4 Oral - Eye Dam. 1 - Resp. Sens. 1 - Skin Irrit. 2 - Skin Sens. 1 - STOT SE 3
• target_organs: Respiratory system
• Storage Class: 11 - Combustible Solids
• wgk_germany: WGK 1
• flash_point_f: 305.6 °F - DIN 51758
• flash_point_c: 152 °C - DIN 51758
• ppe: dust mask type N95 (US), Eyeshields, Faceshields, Gloves