80010

Phthalic acid

puriss. p.a., ≥99.5% (T)

• Synonym(s): 1,2-Benzenedicarboxylic acid
• Linear Formula: C₆H₄-1,2-(CO₂H)₂
• CAS Number: 88-99-3
• Molecular Weight: 166.13
• Beilstein: 608199
• EC Number: 201-873-2
• MDL number: MFCD00002467
• UNSPSC Code: 12352100
• PubChem Substance ID: 57652822
• NACRES: NA.21

Properties

• grade: puriss. p.a.
• Quality Level: 200
• Assay: ≥99.5% (T)
• form: powder or crystals
• ign. residue: ≤0.02% (as SO₄)
• mp: 210-211 °C (dec.) (lit.)
• solubility: water: soluble(lit.)
• anion traces: chloride (Cl^-): ≤50 mg/kg; sulfate (SO₄^2-): ≤50 mg/kg
• cation traces: Ca: ≤10 mg/kg; Cd: ≤5 mg/kg; Co: ≤5 mg/kg; Cr: ≤5 mg/kg; Cu: ≤5 mg/kg; Fe: ≤5 mg/kg; K: ≤50 mg/kg; Mg: ≤5 mg/kg; Mn: ≤5 mg/kg; Na: ≤50 mg/kg; Ni: ≤5 mg/kg; Pb: ≤5 mg/kg; Zn: ≤5 mg/kg
• functional group: carboxylic acid
• SMILES string: OC(C1=C(C(O)=O)C=CC=C1)=O
• InChI: 1S/C8H6O4/c9-7(10)5-3-1-2-4-6(5)8(11)12/h1-4H,(H,9,10)(H,11,12)
• InChI key: XNGIFLGASWRNHJ-UHFFFAOYSA-N

Description

General description

Phthalic acid (1,2-benzenedicarboxylic acid) is an aromatic dicarboxylic acid. On heating, it undergoes dehydration to afford cyclic anhydride. It can be synthesized from phthalic anhydride.

Application

Phthalic acid may be used in the synthesis of benzoic acid. It may be used to constitute the mobile phase during hydrophilic interaction liquid chromatography (HILIC) coupled with electrospray ionization tandem mass spectrometric (ESI-MS/MS) analysis of free amino acids (AAs) in human thyroid tissues.

Safety Information

• Pictograms: GHS05
• Signal Word: Danger
• Hazard Statements: H318
• Precautionary Statements: P280 - P305 + P351 + P338
• Hazard Classifications: Eye Dam. 1
• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 1
• Flash Point(F): 334.4 °F
• Flash Point(C): 168 °C
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves