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60370

Sigma-Aldrich

Potassium hydroxide

puriss. p.a., ≥86% (T), pellets

Synonym(s):

Caustic potash

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About This Item

Linear Formula:
KOH
CAS Number:
Molecular Weight:
56.11
EC Number:
MDL number:
UNSPSC Code:
12352106
eCl@ss:
38100303
PubChem Substance ID:
NACRES:
NA.21

vapor pressure

1 mmHg ( 719 °C)

Quality Level

grade

puriss. p.a.

assay

≥86% (T)

form

pellets

impurities

≤0.0005% total nitrogen (N)
≤0.6% potassium carbonate (K2CO3)

pH

~13.5 (25 °C, 5.6 g/L)

mp

361 °C (lit.)

solubility

alcohol: soluble(lit.)
water: soluble(lit.)

anion traces

chloride (Cl-): ≤50 mg/kg
phosphate (PO43-): ≤5 mg/kg
silicate (as SiO2): ≤5 mg/kg
sulfate (SO42-): ≤40 mg/kg

cation traces

Ag: ≤5 mg/kg
Al: ≤5 mg/kg
Ba: ≤5 mg/kg
Bi: ≤5 mg/kg
Ca: ≤10 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤5 mg/kg
Hg: ≤0.1 mg/kg
Li: ≤5 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Mo: ≤5 mg/kg
Na: ≤5000 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Sr: ≤5 mg/kg
Zn: ≤5 mg/kg

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, Caustic potash) is a base. It is a water absorbing, colorless solid having rhombic crystals. It has been synthesized by reacting potassium carbonate with calcium hydroxide. It is widely employed for the manufacture of dyes and pigments. Pulverized KOH may be used for the preparation of chalcones.

Application

Potassium hydroxide (KOH) may be employed for the following studies:
  • As an etching agent for the laser modified silica glass. It selectively facilitates etching on exposure to femtosecond laser.
  • As a catalyst for the transformation of palm oil along with methanol to methyl esters, via transesterification reaction.
  • Preparation of potassium hydroxide catalyst supported on palm shell activated carbon, which is used for the transesterification of palm oil.
  • To improve the catalytic efficacy of X, Y and ZSM (Zeolite Socony Mobil)-5 zeolites during the synthesis of methyl methacrylate.

Other Notes

Reagent for the decomposition of silicates by fusion

pictograms

CorrosionExclamation mark

signalword

Danger

Hazard Classifications

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

Storage Class

8A - Combustible, corrosive hazardous materials

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable


Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Aufschlussmethoden der anorg. & org. Chemie (1972)
Z. Sulcek et al.
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Polymers, 12(1) (2020-01-08)
The present study aims to investigate adsorptive removal of molecular ciprofloxacin using protein-modified nanosilica (ProMNS). Protein was successfully extracted from Moringa seeds while nanosilica was synthesized from rice husk. Fourier-transform infrared (FTIR), ultraviolet visible (UV-Vis) and high-performance liquid chromatography (HPLC)
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In this study, a novel continuous reactor has been developed to produce high quality methyl esters (biodiesel) from palm oil. A microporous TiO2/Al2O3 membrane was packed with potassium hydroxide catalyst supported on palm shell activated carbon. The central composite design
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