Potassium hydrogen phthalate, 99.99%, acidimetric standard, Thermo Scientific Chemicals

Product Code	Brand	Quantity	Packaging
10418330	Thermo Scientific Acros 177121000	100 g	Plastic bottle
10428330	Thermo Scientific Acros 177125000	500 g	Plastic Bottle
11915051	Thermo Scientific Acros 177120025	2.5 kg	Plastic bottle

Description

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

For ultra trace analysis

Chemical Identifiers

• CAS: 877-24-7
• 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

• InChI Key: IWZKICVEHNUQTL-UHFFFAOYSA-M
• PubChem CID: 23676735
• SMILES: C1=CC=C(C(=C1)C(=O)O)C(=O)[O-].[K+]

Specifications

• CAS: 877-24-7
• Color: White
• Infrared Spectrum: Authentic
• Molecular Formula: C8H5KO4
• Beilstein: 09, 791
• 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
• SMILES: C1=CC=C(C(=C1)C(=O)O)C(=O)[O-].[K+]
• Molecular Weight (g/mol): 204.222
• Formula Weight: 204.22
• Grade: Trace Metal Basis
• Chemical Name or Material: Potassium hydrogen phthalate

• Melting Point: 295.0°C to 300.0°C
• pH: 3.8 to 4 (5% soln. at 20°C)
• Assay Percent Range: 99.99%
• Linear Formula: 2-(HO₂C)C₆H₄CO₂K
• Merck Index: 15, 7733
• InChI Key: IWZKICVEHNUQTL-UHFFFAOYSA-M
• IUPAC Name: potassium;2-carboxybenzoate
• PubChem CID: 23676735
• Percent Purity: 99.95 to 100.05%
• Physical Form: Crystalline Powder or Crystals

Safety and Handling

Emergency Overview
May cause skin, eye, and respiratory tract irritation. The toxicological properties have not been fully investigated.
NFPA
Health:

Signal Word: CAUTION!

Product Identifier

• Potassium hydrogen phthalate

RUO – Research Use Only