Molecular properties
- Formula
- C8H5KO4
- Molar mass
- 204.22 g·mol−1
- Exact mass
- 203.9825 Da
- 6.5
- 1
- 4
- 77.40 Ų
- CAS
- 877-24-7
- PubChem CID
- 23676735
Molecule record
Potassium hydrogen phthalate
C8H5KO4
204.22 g/mol
Interactions
- Polarity
- Often polar; exact polarity depends on size, substitution, and ionization state.
- Acid-base behavior
- Review ionizable groups and pKa data where available; ChemForge does not infer definitive acid-base state from identity alone.
- Intermolecular forces
- Assess dispersion, dipole interactions, hydrogen bonding, and ionic character from the functional groups shown.
Functional groups
Alcohol
Alkene
Aromatic ring
Carboxylic acid
Phenol
Physical properties
No source-backed physical properties are curated for this molecule yet.
Common names and synonyms
- 1,2-Benzenedicarboxylic acid, monopotassium salt
- 1,2-Benzenedicarboxylic acid, potassium salt (1:1)
- 212-889-4
- 29801-94-3
- 877-24-7
- DTXSID0042167
- GG9121M623
- Hydrogen potassium phthalate
Show all 21 synonyms
- KHP
- MFCD00013070
- Monopotassium phthalate
- POTASSIUM 2-CARBOXYBENZOATE
- Phthalic acid monopotassium
- Phthalic acid monopotassium salt
- Potassium acid phthalate
- Potassium biphthalate
- Potassium phthalate monobasic
- Potassium phthalate monobasic pound KHP pound(c)
- RefChem:867719
- SCHEMBL183233
- potassium;2-carboxybenzoate
Structure identifiers
- Canonical SMILES
- C1=CC=C(C(=C1)C(=O)O)C(=O)[O-].[K+]
- Isomeric SMILES
- C1=CC=C(C(=C1)C(=O)O)C(=O)[O-].[K+]
- 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
- PubChem CID
- 23676735
Spectroscopy
Tabs appear only for spectra stored with clear provenance.
Simulated FTIR trace
Predicted FTIR / %T
4 cm-1 resolution / deterministic instrument profile
Hover for cursor
Peak assignments
3350 cm−1broad O-H (simulated)
3000 cm−1broad acid O-H (simulated)
1710 cm−1C=O acid (simulated)
1645 cm−1C=C alkene (simulated)
3030 cm−1aromatic C-H (simulated)
1600 cm−1aromatic C=C (simulated)
2960 cm−1sp3 C-H (simulated)
Simulated NMR
On-demand educational prediction for Potassium hydrogen phthalate; not experimental data.
Simulated EI mass spectrum
On-demand educational fragmentation for Potassium hydrogen phthalate; not experimental data.
Sources
Molecule identity
Retrieved 8/7/2026. Reuse status is summarized by the badge; open the source for full details.
simulated IR
ChemForge original educational simulation.