Potassium hydrogen phthalate, primary standard, ACS, 99.95-100.05%, Thermo Scientific Chemicals

Product Code	Brand	Quantity
11347678	Thermo Scientific Alfa Aesar 033351.30	250 g
11337678	Thermo Scientific Alfa Aesar 033351.A1	1 kg

Description

As a primary standard for preparing volumetric alkali solutions and as a buffer in pH determinations. Potassium hydrogen phthalate is used as a primary standard for acid- base titrations as well as for calibrating pH meters. It acts as a buffer in pH determination. It finds application as a useful standard for total organic carbon testing.

This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo Scientific Chemicals.

Chemical Identifiers

• CAS: 877-24-7
• Molecular Weight (g/mol): 204.222
• InChI Key: IWZKICVEHNUQTL-UHFFFAOYSA-M
• PubChem CID: 23676735
• SMILES: C1=CC=C(C(=C1)C(=O)O)C(=O)[O-].[K+]

• Molecular Formula: C8H5KO4
• MDL Number: MFCD00013070
• Synonym: potassium hydrogen phthalate, potassium biphthalate, monopotassium phthalate, potassium acid phthalate, hydrogen potassium phthalate, phthalic acid monopotassium salt, 1,2-benzenedicarboxylic acid, monopotassium salt, phthalic acid, monopotassium salt, phthalic acid potassium salt, potassium phthalate monobasic
• IUPAC Name: potassium;2-carboxybenzoate

Specifications

• Melting Point: 297°C (decomposition)
• Color: White
• Assay Percent Range: 99.95-100.05%
• MDL Number: MFCD00013070
• Synonym: potassium hydrogen phthalate, potassium biphthalate, monopotassium phthalate, potassium acid phthalate, hydrogen potassium phthalate, phthalic acid monopotassium salt, 1,2-benzenedicarboxylic acid, monopotassium salt, phthalic acid, monopotassium salt, phthalic acid potassium salt, potassium phthalate monobasic
• InChI Key: IWZKICVEHNUQTL-UHFFFAOYSA-M
• IUPAC Name: potassium;2-carboxybenzoate
• PubChem CID: 23676735
• Grade: ACS Reagent
• Chemical Name or Material: Potassium hydrogen phthalate, primary standard, For ACS analysis

• CAS: 877-24-7
• Physical Form: Crystalline Powder
• Molecular Formula: C8H5KO4
• Beilstein: 3637128
• Solubility Information: Soluble in water. Slightly soluble in alcohol.
• SMILES: C1=CC=C(C(=C1)C(=O)O)C(=O)[O-].[K+]
• Molecular Weight (g/mol): 204.222
• Formula Weight: 204.23
• Density: 1.636 g/mL

Safety and Handling

missing translation for 'einecsNumber' : 212-889-4

missing translation for 'rtecsNumber' : CZ4326000

missing translation for 'tsca' : Yes

Recommended Storage : Ambient temperatures

RUO – Research Use Only