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Sigma-Aldrich

Potassium hydroxide

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

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Synonym(s):
Caustic potash
Linear Formula:
KOH
CAS Number:
1310-58-3
Molecular Weight:
56.11
EC Number:
215-181-3
MDL number:
MFCD00003553
eCl@ss:
38100303
PubChem Substance ID:
329753558
NACRES:
NA.21

grade

semiconductor grade

Quality Level

200

vapor pressure

1 mmHg ( 719 °C)

Assay

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

form

pellets

composition

KOH, >85.0%

impurities

15% water

pH

~13.5 (25 °C, 5.6 g/L)

mp

361 °C (lit.)

cation traces

Na: ≤500.0 ppm

SMILES string

[OH-].[K+]

InChI

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

InChI key

KWYUFKZDYYNOTN-UHFFFAOYSA-M

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General description

Potassium hydroxide (KOH), also known as caustic potash. It is used as a significant precursor to many potassium containing products.

Application

In combination with tellurium powder, mediates the quantitative pinacolization of aromatic carbonyl compounds.
Potassium hydroxide can be used:
  • As a base in the synthesis of imines, starting from amines and alcohols.
  • As a base in β-alkylation of secondary alcohols with primary alcohols without any transition metal catalyst.
  • In combination with aluminium for pinacolization of aromatic aldehydes and reduction of hindered ketones.
  • As a precipitating agent in the synthesis of MnZn ferrites nanoparticles (Mn0.8Zn0.2Fe2O4 ferrite nanoparticles) by modified hydrothermal method.

Pictograms

CorrosionExclamation mark
GHS05,GHS07

Signal Word

Danger

Hazard Statements

H290 - H302 - H314

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

Regulatory Information

危险化学品

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The journal of physical chemistry. C, Nanomaterials and interfaces, 122(29), 16756-16764 (2018-09-28)
The effect of the alkali-metal cation (Li+, Na+, K+, and Cs+) on the non-Nernstian pH shift of the Pt(554) and Pt(533) step-associated voltammetric peak is elucidated over a wide pH window (1-13), through computation and experiment. In conjunction with our
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