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60220

Sigma-Aldrich

Potassium phosphate monobasic

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

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Synonym(s):
Monopotassium phosphate, Potassium dihydrogen phosphate, prim.-Potassium phosphate
Linear Formula:
KH2PO4
CAS Number:
Molecular Weight:
136.09
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

grade

ACS reagent
anhydrous
puriss. p.a.

Quality Level

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.)

solubility

water: 0.5 g/10 mL, clear, colorless to light yellow

density

2.338 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤5 mg/kg
sulfate (SO42-): ≤30 mg/kg

cation traces

As: ≤0.5 mg/kg
Ca: ≤10 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤15 mg/kg
Cu: ≤5 mg/kg
Fe: ≤5 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Na: ≤50 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Zn: ≤5 mg/kg
heavy metals: ≤0.001% (by ICP)

SMILES string

[K+].OP(O)([O-])=O

InChI

1S/K.H3O4P/c;1-5(2,3)4/h;(H3,1,2,3,4)/q+1;/p-1

InChI key

GNSKLFRGEWLPPA-UHFFFAOYSA-M

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This Item
795488PHR1330P5655
Potassium phosphate monobasic buffer substance, anhydrous, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., 99.5-100.5%

60220

Potassium phosphate monobasic

Essential Grade
Potassium phosphate monobasic anhydrous, free-flowing, Redi-Dri™, ACS reagent, ≥99%

795488

Potassium phosphate monobasic

-
Monobasic Potassium Phosphate Pharmaceutical Secondary Standard; Certified Reference Material

PHR1330

Monobasic Potassium Phosphate

-
Potassium phosphate monobasic powder, suitable for cell culture, suitable for insect cell culture, suitable for plant cell culture, ≥99.0%

P5655

Potassium phosphate monobasic

-
assay

99.5-100.5%

assay

≥99%

assay

-

assay

≥99.0%

Quality Level

100

Quality Level

200

Quality Level

300

Quality Level

200

form

crystalline

form

powder or crystals

form

-

form

powder

density

2.338 g/mL at 25 °C (lit.)

density

2.338 g/mL at 25 °C (lit.)

density

2.338 g/mL at 25 °C (lit.)

density

2.338 g/mL at 25 °C (lit.)

solubility

water: 0.5 g/10 mL, clear, colorless to light yellow

solubility

-

solubility

-

solubility

water: 100 mg/mL, clear, colorless

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

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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