Potassium phthalate monobasic

Potassium phthalate monobasic, ACS reagent, acidimetric standard

ACS reagent

200

99.95-100.05% dry basis

crystals

acidimetric standard

≤0.002% S compounds, ≤0.003% Cl compounds, ≤0.005% insolubles

4.00-4.02 (25.0 °C±0.2 °C, 0.05 M)

295-300 °C (dec.) (lit.)

water: soluble (93 g/l at 30 °C (86 °F))

chlorine and bromine (as Cl^-): ≤0.003%, sulfur compounds (as SO₄^2-): ≤0.002%

Fe: ≤5 ppm, Na: ≤0.005%, heavy metals: ≤5 ppm (by ICP)

carboxylic acid

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

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

IWZKICVEHNUQTL-UHFFFAOYSA-M