60220

Potassium phosphate monobasic

buffer substance, anhydrous, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., 99.5-100.5%

• Synonym(s): Monopotassium phosphate, Potassium dihydrogen phosphate, prim.-Potassium phosphate
• Linear Formula: KH₂PO₄
• CAS Number: 7778-77-0
• Molecular Weight: 136.09
• EC Number: 231-913-4
• MDL number: MFCD00011401
• UNSPSC Code: 12352300
• PubChem Substance ID: 329758828
• NACRES: NA.21

Properties

• grade: ACS reagent; anhydrous; puriss. p.a.
• Quality Level: 100
• Agency: reag. ISO; reag. Ph. Eur.
• Assay: 99.5-100.5%
• form: crystalline
• impurities: ≤0.001% total nitrogen (N)
• loss: ≤0.2% loss on drying, 105 °C
• pH: 4.2-4.5 (20 °C, 5%)
• pKa (25 °C): (1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)
• mp: 252.6 °C (lit.)

Description

General description

Potassium phosphate is widely used in buffers to prepare biological samples and examine biological interactions.

Application

Potassium phosphate monobasic has been used:

• to prepare the working luminol solution to study the prooxidant activity in the chemiluminescent system luminol–H₂O₂
• in phosphate buffer saline (PBS) to culture embryonic stem cells (ESCs) and generate embryoid bodies
• in PBS to prepare polydimethylsiloxane (PDMS) substrate

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 1
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable