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PX1476

Potassium Hydrogen Phthalate

Meets ACS Specifications GR ACS

Synonym(s):

Potassium Hydrogen Phthalate, Potassium Biphthalate, Potassium Acid Phthalate

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About This Item

Linear Formula:
KHC8H4O4
CAS Number:
877-24-7
Molecular Weight:
204.22
UNSPSC Code:
41116107
EC Index Number:
212-889-4
MDL number:
MFCD00013070
Assay:
99.95-100.05% dry basis
Grade:
ACS reagent
Form:
solid
Solubility:
80 g/L
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grade

ACS reagent

Quality Segment

assay

99.95-100.05% dry basis

form

solid

impurities

≤0.002% Sulfur compounds (as S), ≤0.005% Insoluble matter

color

white

pH

4.0 (20 °C, 50 g/L in H2O)

mp

295-300 °C

solubility

80 g/L

anion traces

chloride (Cl-): 0.003%

cation traces

Fe: ≤5 ppm, Na: ≤0.005%, heavy metals (as Pb): ≤5 ppm

shipped in

ambient

storage temp.

room temp

SMILES string

[K+].[O-]C(=O)c1c(cccc1)C(=O)[O-].[H+]

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

Application

Meets ACS Specifications GR ACS

Analysis Note

Assay (dried basis)99.95-100.05%Chlorine compounds (as Cl)0.003% maxColorWhiteFormCrystalsHeavy metals (as Pb)5ppm maxInsoluble matter0.005% maxIron (Fe)5ppm maxSodium (Na)0.005% maxSulfur compounds (as S)0.002% maxpH of a 0.05 m solution at 25.0 ± 0.2°C4.00-4.02

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Flash Point (°F)

387.1 °F - Pensky-Martens closed cup

Flash Point (°C)

197.3 °C - Pensky-Martens closed cup

Storage Class

11 - Combustible Solids

WGK

WGK 1

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