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Merck

30603

Potassium hydroxide

pellets, reag. Ph. Eur., ≥85%

Synonym(s):

Caustic potash

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About This Item

Linear Formula:
KOH
CAS Number:
1310-58-3
Molecular Weight:
56.11
PubChem Substance ID:
329753544
eCl@ss:
38100303
UNSPSC Code:
12352106
NACRES:
NA.21
EC Number:
215-181-3
MDL number:
MFCD00003553
Assay:
≥85%
Form:
pellets
Solubility:
water: soluble ((1,130 g/l (68 °F / 20 °C))

Key Documents

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InChI key

KWYUFKZDYYNOTN-UHFFFAOYSA-M

InChI

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

agency

USP/NF, reag. Ph. Eur.

vapor pressure

1 mmHg ( 719 °C)

assay

≥85%

form

pellets

impurities

≤2.0% K2CO3

pH

~13.5 (25 °C, 5.6 g/L)

mp

361 °C (lit.)

Quality Level

200

solubility

water: soluble ((1,130 g/l (68 °F / 20 °C))

anion traces

chloride (Cl-): ≤0.02%, phosphate (PO43-): ≤0.01%, sulfate (SO42-): ≤0.02%

cation traces

Al: ≤0.001%, Ca: ≤0.001%, Fe: ≤0.001%, Na: ≤1.0%, Ni: ≤0.0005%

SMILES string

[OH-].[K+]

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General description

Potassium hydroxide is a strong alkali that can be used in nucleophilic substitution reactions, addition reactions, and basic hydrolysis reactions. It can also be used to catalyze aldol-type reactions.

Application

Potassium hydroxide can be used as a base:
  • In the Pd-catalyzed Heck reaction of aryl halides with alkenes.
  • To synthesize β-alkylated alcohols via pincer-Ni catalyzed Guerbet reaction.
  • For the hydroxylation of aryl or heteroarylboronic acids to corresponding phenols.
It can also be used as a catalyst for the:
  • Transesterification of triglycerides to prepare biodiesels.
  • Synthesis of β-phenylethylamines via intermolecular addition of arylamines to styrenes.
  • Claisen-Schmidt condensation reaction to synthesize chalcones.

Packaging

This product is also available in glass bottles.

pictograms

CorrosionExclamation mark
GHS05,GHS07

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

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

Substances Subject to be Indicated Names

ishl_indicated

Substances Subject to be Notified Names

ishl_notified

30603S-1KG: + 30603-6X1KG: + 30603-6X500G: + 30603-20KG: + 30603-4X5KG: + 30603-2.5KG:4548173333212 + 30603-1KG:4548173333205 + 30603-5KG:4548173333236 + 30603S-6X1KG: + 30603-BULK: + 30603-500G:4548173333229 + 30603-VAR: + 30603-25KG-H: + 30603-1KG-GL:

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Potassium hydroxide catalyzed addition of arylamines to styrenes
Jaspers D, et al.
Synlett, 2011, 1444-1448 (2011)
Novel CuCl2-cryptand-[2.2. Benzo] complex: A base free and oxidant free catalyst for Ipso-Hydroxylation of aryl/heteroaryl-boronic acids in water at room temperature
Bora S, et al.
Journal of Organometallic Chemistry, 851, 52-56 (2017)
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
Saeid Baroutian et al.
Bioresource technology, 102(2), 1095-1102 (2010-10-05)
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
Kinetics of palm oil transesterification in a batch reactor.
Darnoko D and Cheryan M.
Journal of the American Oil Chemists' Society, 77(12), 1263-1267 (2000)
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