All Photos(2)

484016

Sigma-Aldrich

Potassium hydroxide

reagent grade, 90%, flakes

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

Quality Level

grade

reagent grade

vapor pressure

1 mmHg ( 719 °C)

assay

90%

form

flakes

pH

~13.5 (25 °C, 5.6 g/L)

mp

361 °C (lit.)

solubility

water: soluble 1120 g/L

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) is a hygroscopic, water soluble base synthesized by the electrolysis of potassium chloride solution. It is the raw material for the synthesis of many potassium compounds. KOH reacts with CO2 to form potassium carbonate. This property can be utilized to absorb CO2. It participates as catalyst in aldol condensation reactions. KOH anisotropic etching of silicon is used for the fabrication of sub-micron silicon nitride waveguides using conventional contact lithography. Pulverized KOH may be used for the preparation of chalcones.

Application

Potassium hydroxide (KOH) was used in the following processes:
  • Quantification of glutathione (GSH) and glutathione disulfide (GSSG) in biological samples by HPLC.
  • Preparation of buffer for use in the Investigation of seed fatty acid (FA) composition, protein, oil and sugar content.
  • Stable isotopic profiling study of Caenorhabditis elegans.
Potassium hydroxide may be employed as an etchant for the laser modified glass. In combination with tellurium powder, it mediates the quantitative pinacolization of aromatic carbonyl compounds.

Packaging

10 kg in fiber drum
1 kg in poly bottle

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 Germany

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Certificate of Origin

Marni J Falk et al.
Journal of visualized experiments : JoVE, (48)(48), doi:10-doi:10 (2011-03-16)
Stable isotopic profiling has long permitted sensitive investigations of the metabolic consequences of genetic mutations and/or pharmacologic therapies in cellular and mammalian models. Here, we describe detailed methods to perform stable isotopic profiling of intermediary metabolism and metabolic flux in...
Seed Storage Reserve Analysis
van Erp H, et al.
Bio-protocol, 4(20), e1263-e1263 (2014)
Eagleson M.
Concise Encyclopedia Chemistry, 888-888 (1994)
Beatriz Martín-García et al.
Small (Weinheim an der Bergstrasse, Germany), 15(52), e1904670-e1904670 (2019-12-04)
Among the large family of transition metal dichalcogenides, recently ReS2 has stood out due to its nearly layer-independent optoelectronic and physicochemical properties related to its 1T distorted octahedral structure. This structure leads to strong in-plane anisotropy, and the presence of...
Yuewang Huang et al.
Optics express, 23(5), 6780-6786 (2015-04-04)
We demonstrate a novel technique to fabricate sub-micron silicon nitride waveguides using conventional contact lithography with MEMS-grade photomasks. Potassium hydroxide anisotropic etching of silicon facilitates line reduction and roughness smoothing and is key to the technique. The fabricated waveguides is...

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