Phthalic acid monopotassium salt

• CAT Number: R070884
• CAS Number: 877-24-7
• Molecular Formula: C8H5KO4
• Molecular Weight: 204.22
• Purity: ≥95%
• Synonyms: Potassium hydrogen phthalate
• Storage: RT
• IUPAC Name: potassium;2-carboxybenzoate
• InChI: 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
• InChIKey: IWZKICVEHNUQTL-UHFFFAOYSA-M
• SMILES: C1=CC=C(C(=C1)C(=O)O)C(=O)[O-].[K+]

Phthalic acid monopotassium salt（Cat No.:R070884）is a partially neutralized salt of phthalic acid, with the molecular formula C8H5KO4. It consists of a benzene ring with two adjacent carboxylic acid groups, one of which is deprotonated and bonded to a potassium ion. This white, water-soluble crystalline compound is used as a buffering agent and intermediate in chemical synthesis. It plays a role in preparing dyes, pigments, resins, and pharmaceuticals. Its stable, mildly acidic properties make it useful in controlled pH environments and laboratory applications where partial ionization of phthalic acid is desired.