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

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.

Specifications

Chemical Identifiers

• CAS: 877-24-7
• Molecular Formula: C8H5KO4
• Molecular Weight (g/mol): 204.222
• MDL Number: MFCD00013070
• InChI Key: IWZKICVEHNUQTL-UHFFFAOYSA-M
• 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
• PubChem CID: 23676735
• IUPAC Name: potassium;2-carboxybenzoate
• SMILES: C1=CC=C(C(=C1)C(=O)O)C(=O)[O-].[K+]

• Melting Point: 297°C (decomposition)
• Color: White
• Physical Form: Crystalline Powder
• Quantity: 250 g
• Assay Percent Range: 99.95-100.05%
• Beilstein: 3637128
• Solubility Information: Soluble in water. Slightly soluble in alcohol.
• Formula Weight: 204.23
• Grade: ACS Reagent
• Density: 1.636 g/mL
• Chemical Name or Material: Potassium hydrogen phthalate, primary standard, For ACS analysis

Safety and Handling

EINECSNumber	212-889-4
RTECSNumber	CZ4326000
TSCA	Yes
Recommended Storage	Ambient temperatures

SDS

RUO – Research Use Only