PX1476

Potassium Hydrogen Phthalate

Meets ACS Specifications GR ACS

• Synonym(s): Potassium Hydrogen Phthalate, Potassium Biphthalate, Potassium Acid Phthalate
• Empirical Formula (Hill Notation): C₈H₅KO₄
• CAS Number: 877-24-7
• Molecular Weight: 204.22
• MDL number: MFCD00013070
• UNSPSC Code: 41116107
• EC Index Number: 212-889-4

Properties

• Quality Level: 200
• 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
• 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

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

Safety Information

• Storage Class: 13 - Non Combustible Solids
• wgk_germany: WGK 3
• flash_point_f: 387.1 °F - Pensky-Martens closed cup
• flash_point_c: 197.3 °C - Pensky-Martens closed cup