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Merck
CN

80010

Phthalic acid

≥99.5% (T), powder or crystals, puriss. p.a.

Synonym(s):

1,2-Benzenedicarboxylic acid

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About This Item

Linear Formula:
C6H4-1,2-(CO2H)2
CAS Number:
Molecular Weight:
166.13
NACRES:
NA.21
PubChem Substance ID:
UNSPSC Code:
12352100
EC Number:
201-873-2
MDL number:
Beilstein/REAXYS Number:
608199
Assay:
≥99.5% (T)
Form:
powder or crystals
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Product Name

Phthalic acid, puriss. p.a., ≥99.5% (T)

grade

puriss. p.a.

Quality Segment

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-): ≤10 mg/kg, sulfate (SO42-): ≤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

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.


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pictograms

Corrosion

signalword

Danger

hcodes

Hazard Classifications

Eye Dam. 1

Storage Class

11 - Combustible Solids

wgk

WGK 1

flash_point_f

334.4 °F

flash_point_c

168 °C

ppe

dust mask type N95 (US), Eyeshields, Gloves



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