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60357

Potassium phthalate monobasic

Name: Potassium phthalate monobasic
Brand: SIAL

reference material for titrimetry, certified by BAM, >99.5%

Synonym(s):

KHP, Phthalic acid monopotassium salt, Potassium biphthalate, Potassium hydrogen phthalate

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About This Item

Linear Formula:

HOOCC₆H₄COOK

CAS Number:

877-24-7

Molecular Weight:

204.22

UNSPSC Code:

41116107

NACRES:

NA.24

PubChem Substance ID:

329758900

EC Number:

212-889-4

Beilstein/REAXYS Number:

3637128

MDL number:

MFCD00013070

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Properties

grade

reference material

Quality Level

100

assay

>99.5%

quality

certified by BAM

technique(s)

titration: suitable

pH

mp

295-300 °C (dec.) (lit.)

application(s)

environmental

format

neat

SMILES string

[K+].OC(=O)c1ccccc1C([O-])=O

InChI

1S/C8H6O4.K/c9-7(10)5-3-1-2-4-6(5)8(11)12;/h1-4H,(H,9,10)(H,11,12);/q;+1/p-1

InChI key

IWZKICVEHNUQTL-UHFFFAOYSA-M

Description

General description

Download your certificate at http://www.sigma-aldrich.com to view certified values, including uncertainty and expiry date.

Potassium hydrogen phthalate, also known as KHP, is a volumetric standard produced under stringent conditions and measured with the highest possible precision. The content of the standard is measured using volumetric acid-base titrations. Its certified value and uncertainty measurement are in accordance with ISO Guide 35.

Application

It finds its use as a reference material for the standardization of volumetric solutions in alkalimetric titrations.

Features and Benefits

Available as a solid in a secure glass bottle to ensure its stability for the entire shelf life until opened.
High-purity material traceable to NIST SRM
High-quality offering accurate titer determinations
Accompanied by a certificate of analysis (CoA)

Analysis Note

Exact concentration, expiry date and detailed information on certification can be found on the certificate and certification report, included in each package. Content and expiry date on label.

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Storage Class

11 - Combustible Solids

wgk

WGK 1

flash_point_f

387.1 °F - Pensky-Martens closed cup

flash_point_c

197.3 °C - Pensky-Martens closed cup

ppe

Eyeshields, Gloves, type N95 (US)

Choose from one of the most recent versions:

Certificates of Analysis (COA)

Lot/Batch Number

BCCJ8134

BCCC4843

BCBT3524

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Purity of potassium hydrogen phthalate, determination with precision coulometric and volumetric titration--A comparison

Recknagel S, et al.

Analytica Chimica Acta, 599(2), 256-263 (2007)

Purity of potassium hydrogen phthalate, determination with precision coulometric and volumetric titration?A comparison