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P5958

Sigma-Aldrich

Potassium hydroxide

BioXtra, ≥85% KOH basis

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Synonym(s):
Caustic potash
Linear Formula:
KOH
CAS Number:
Molecular Weight:
56.11
EC Number:
MDL number:
eCl@ss:
38100303
PubChem Substance ID:
NACRES:
NA.21

vapor pressure

1 mmHg ( 719 °C)

product line

BioXtra

Assay

≥85% KOH basis

form

pellets

impurities

≤0.0005% Phosphorus (P)
≤0.1% Insoluble matter
≤2.0% K2CO3

pH

~13.5 (25 °C, 5.6 g/L)

mp

361 °C (lit.)

solubility

H2O: 1 M, clear, colorless

anion traces

chloride (Cl-): ≤0.01%
sulfate (SO42-): ≤0.003%

cation traces

Al: ≤0.0005%
Ca: ≤0.0005%
Cu: ≤0.0005%
Fe: ≤0.0005%
Mg: ≤0.0005%
NH4+: ≤0.05%
Na: ≤0.05%
Pb: ≤0.001%
Zn: ≤0.0005%

SMILES string

[OH-].[K+]

InChI

1S/K.H2O/h;1H2/q+1;/p-1

InChI key

KWYUFKZDYYNOTN-UHFFFAOYSA-M

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1 of 4

This Item
221473306568PX1480
Potassium hydroxide BioXtra, ≥85% KOH basis

Sigma-Aldrich

P5958

Potassium hydroxide

Potassium hydroxide ACS reagent, ≥85%, pellets

Sigma-Aldrich

221473

Potassium hydroxide

Potassium hydroxide semiconductor grade, pellets, 99.99% trace metals basis (Purity excludes sodium content.)

Sigma-Aldrich

306568

Potassium hydroxide

Potassium hydroxide pellets, Meets ACS Specifications, Meets Reagent Specifications for testing USP/NF monographs GR ACS

Supelco

PX1480

Potassium hydroxide

assay

≥85% KOH basis

assay

≥85%

assay

99.99% trace metals basis (Purity excludes sodium content.)

assay

≥85.0%

form

pellets

form

pellets

form

pellets

form

pellets

impurities

≤0.0005% Phosphorus (P), ≤0.1% Insoluble matter, ≤2.0% K2CO3

impurities

≤0.001% N compounds, ≤2.0% K2CO3, 10-15% water

impurities

15% water

impurities

-

pH

~13.5 (25 °C, 5.6 g/L)

pH

~13.5 (25 °C, 5.6 g/L)

pH

~13.5 (25 °C, 5.6 g/L)

pH

14 (20 °C, 56 g/L in H2O)

mp

361 °C (lit.)

mp

361 °C (lit.)

mp

361 °C (lit.)

mp

361 °C (lit.)

General description

Potassium hydroxide is an inorganic compound commonly known as caustic potash. It is a strong alkali, readily reacts with acids. It can be used in various reactions such as nucleophilic substitution, hydrolysis, and addition reactions. Sometimes it can also be used as a catalyst for aldol-type reactions.

Application

Potassium hydroxide can be used to adjust the pH of the solution.
It can also be used:
  • As a catalyst in the alkynylation of heteroaromatic N-oxides to synthesize corresponding C2-alkynylheterocycles.
  • As a superbase medium with dimethyl sulfoxide (KOH/DMSO medium) for the synthesis of cross-coupling products under transition metal-free conditions from reactions between aryl halides and various sulfur, oxygen and nitrogen-based nucleophiles.
  • In the synthesis and thermodynamic study of Na-based zeolites.

Pictograms

CorrosionExclamation mark

Signal Word

Danger

Hazard Statements

Hazard Classifications

Acute Tox. 4 Oral - Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1A

Storage Class Code

8A - Combustible, corrosive hazardous materials

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


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