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P1088

Sigma-Aldrich

Potassium hydrogen phthalate

BioXtra, ≥99.95%

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Synonym(s):
Potassium phthalate monobasic, KHP, Phthalic acid monopotassium salt, Potassium biphthalate, Potassium hydrogen phthalate
Linear Formula:
HOOCC6H4COOK
CAS Number:
Molecular Weight:
204.22
Beilstein/REAXYS Number:
3637128
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.25

product line

BioXtra

Quality Level

assay

≥99.95%

form

powder or crystals

impurities

<0.005% Insoluble matter
<0.005% Phosphorus (P)

pH

4

mp

295-300 °C (dec.) (lit.)

anion traces

chloride (Cl-): <0.003%
sulfur compounds (as SO42-): ≤0.002%

cation traces

Al: <0.0005%
Ca: <0.005%
Cu: <0.0005%
Fe: <0.0005%
Mg: <0.0005%
NH4+: <0.05%
Na: <0.005%
Pb: <0.001%
Zn: <0.0005%

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

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1 of 4

This Item
NIST2185NIST185I1.02400
vibrant-m

P1088

Potassium hydrogen phthalate

Premium Grade
vibrant-m

NIST2185

Potassium hydrogen phthalate

-
vibrant-m

NIST185I

Potassium hydrogen phthalate

-
vibrant-m

1.02400

Potassium hydrogen phthalate

-
product line

BioXtra

product line

-

product line

-

product line

-

Quality Level

200

Quality Level

100

Quality Level

100

Quality Level

300

form

powder or crystals

form

crystals

form

crystals

form

solid

pH

4

pH

-

pH

-

pH

4.0 (20 °C, 50 g/L in H2O)

cation traces

Al: <0.0005%, Cu: <0.0005%, Mg: <0.0005%, Na: <0.005%, Zn: <0.0005%, Ca: <0.005%, NH4+: <0.05%, Fe: <0.0005%, Pb: <0.001%

cation traces

-

cation traces

-

cation traces

-

General description

Potassium hydrogen phthalate (KHP) is a semi-organic salt that is a member of the alkali acid phthalate series. KHP crystals are useful in devices because of their electro-optical properties. It usually acts as a model compound due to its well-developed surface pattern on the (010) face that can be easily observed by optical microscopy.

Application

Potassium hydrogen phthalate has been used as a substrate to assess the permeation from the extracellular (EC) to the periplasmic (PP) side through DcaP. It has also been used as one of the polyurethane materials for the characterization of polyester triol (OH).

Features and Benefits

  • Long-term stability
  • Exhibits dielectric properties

Storage Class

13 - Non Combustible Solids

wgk_germany

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)


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