Synonym:
1,2-Benzenedicarboxylic acid
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CAS Number 88-99-3
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Linear Formula C6H4-1,2-(CO2H)2
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Molecular Weight 166.13
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Beilstein Registry Number 608199
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EC Number 201-873-2
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MDL number MFCD00002467
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PubChem Substance ID 57652822
Properties:
| Related Categories |
Acids,
Acids & Bases,
Analytical Reagents,
Analytical Reagents for General Use,
Analytical/Chromatography,
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InChI Key
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XNGIFLGASWRNHJ-UHFFFAOYSA-N
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grade
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puriss. p.a.
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assay
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≥99.5% (T)
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form
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powder or crystals
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ign. residue
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≤0.02% (as SO4)
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mp
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210-211 °C (dec.)(lit.)
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solubility
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water: soluble(lit.)
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anion traces
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chloride (Cl-): ≤50 mg/kg
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sulfate (SO42-): ≤50 mg/kg
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cation traces
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Ca: ≤10 mg/kg
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Cd: ≤5 mg/kg
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Co: ≤5 mg/kg
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Cr: ≤5 mg/kg
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Cu: ≤5 mg/kg
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Fe: ≤5 mg/kg
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K: ≤50 mg/kg
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Mg: ≤5 mg/kg
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Mn: ≤5 mg/kg
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Na: ≤50 mg/kg
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Ni: ≤5 mg/kg
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Pb: ≤5 mg/kg
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Zn: ≤5 mg/kg
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Description:
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.
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.
Safety:
Symbol

GHS07
Hazard statements
H315-H319-H335
Precautionary statements
P261-P305 + P351 + P338
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
RIDADR
NONH for all modes of transport