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Merck
CN

1535899

USP

Phthalic acid

United States Pharmacopeia (USP) Reference Standard

Synonym(s):

Phthalic acid, 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
UNSPSC Code:
41116107
NACRES:
NA.24
PubChem Substance ID:
329750832
MDL number:
MFCD00002467
Beilstein/REAXYS Number:
608199

Key Documents

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Product Name

Phthalic acid, United States Pharmacopeia (USP) Reference Standard

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

InChI key

XNGIFLGASWRNHJ-UHFFFAOYSA-N

grade

pharmaceutical primary standard

API family

fluorescein

form

crystalline

manufacturer/tradename

USP

mp

210-211 °C (dec.) (lit.)

solubility

alcohol: soluble
water: partially soluble

density

1.59 g/cm3 at 15 °C

application(s)

pharmaceutical (small molecule)

format

neat

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Analysis Note

These products are for test and assay use only. They are not meant for administration to humans or animals and cannot be used to diagnose, treat, or cure diseases of any kind.  ​

Application

Phthalic acid USP reference standard, intended for use in specified quality tests and assays as specified in the USP compendia. Also, for use with USP monographs such as:
  • Fluorescein Injection
  • Fluorescein Sodium

General description

This product is provided as delivered and specified by the issuing Pharmacopoeia. All information provided in support of this product, including MSDS and any product information leaflets have been developed and issued under the Authority of the issuing Pharmacopoeia.
For further information and support please go to the website of the issuing Pharmacopoeia.

Other Notes

Sales restrictions may apply.

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

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