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Merck

402915

Phthalic acid

ACS reagent grade, ≥99.5%, powder or crystals

Synonym(s):

1,2-Benzenedicarboxylic acid

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About This Item

Linear Formula:
C6H4-1,2-(CO2H)2
CAS Number:
88-99-3
Molecular Weight:
166.13
NACRES:
NA.21
PubChem Substance ID:
24865138
UNSPSC Code:
12352100
EC Number:
201-873-2
MDL number:
MFCD00002467
Beilstein/REAXYS Number:
608199

Product Name

Phthalic acid, ACS reagent, ≥99.5%

InChI key

XNGIFLGASWRNHJ-UHFFFAOYSA-N

InChI

1S/C8H6O4/c9-7(10)5-3-1-2-4-6(5)8(11)12/h1-4H,(H,9,10)(H,11,12)

SMILES string

OC(C1=C(C(O)=O)C=CC=C1)=O

grade

ACS reagent

assay

≥99.5%

form

powder or crystals

impurities

≤0.05% insolubles
≤0.5% water

ign. residue

≤0.02%

mp

210-211 °C (dec.) (lit.)

anion traces

chloride (Cl-): ≤0.001%
nitrate (NO3-): ≤0.005%
sulfate (SO42-): ≤0.005%

cation traces

Fe: ≤0.001%
heavy metals: ≤0.001%

functional group

carboxylic acid

Quality Level

200

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Application

Phthalic acid may be used as a catalyst for the thiocyanation of aromatics and heteroaromatics and as an interfacial protector for the preparation of ordered mesoporous γ-alumina. It may be used as a model compound in understanding the adsorption of aromatic carboxylic acids on gold surfaces.

General description

Phthalic acid (PA, PTA), also called as 1,2-benzenedicarboxylic acid is an aromatic carboxylic acid. It is the ortho form of the three phthalic acid isomers, the other two being isophthalic acid (meta form) and terephthalic acid (para form). PA is the starting material in the synthesis of plasticizers. A study on toxicity reveals that PA shows in vitro and in vivo toxicity. Its mineralization by photocatalysis using TiO2/UV system has been studied. It also is used as a potential tyrosinase inhibitor.

pictograms

Corrosion
GHS05

signalword

Danger

hcodes

H318

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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Certificates of Analysis (COA)

Lot/Batch Number
WXBF5114V
WXBF4263V
WXBF2395V
BCCL2348
WXBF3775V

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Modeling of photocatalytic mineralization of phthalic acid in TiO2 suspension using response surface methodology (RSM).
Abaamrane A, et al.
Desalination and Water Treatment, 53(1), 249-256 (2015)
Phthalic acid as a di-functional organocatalyst for the regioselective thiocyanation of aromatic compounds.
Sajjadifar S, et al.
Scientia Iranica. Transaction C, Chemistry, Chemical Engineering, 21(6), 2005-2005 (2014)
Shang-Jun Yin et al.
Enzyme research, 2011, 294724-294724 (2011-06-04)
Tyrosinase inhibition studies are needed due to the medicinal applications such as hyperpigmentation. For probing effective inhibitors of tyrosinase, a combination of computational prediction and enzymatic assay via kinetics was important. We predicted the 3D structure of tyrosinase, used a
A new synthetic procedure for ordered mesoporous γ-alumina using phthalic acid as an interfacial protector.
Huang F, et al.
Materials Letters, 65(2), 244-246 (2011)
Du Yeon Bang et al.
Toxicological research, 27(4), 191-203 (2011-12-01)
There has been growing concern about the toxicity of phthalate esters. Phthalate esters are being used widely for the production of perfume, nail varnish, hairsprays and other personal/cosmetic uses. Recently, exposure to phthalates has been assessed by analyzing urine for
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