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Merck

221473

Potassium hydroxide

ACS reagent, ≥85%, pellets

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:
329752271
eCl@ss:
38100303
UNSPSC Code:
12352106
NACRES:
NA.21
EC Number:
215-181-3
MDL number:
MFCD00003553
assay:
≥85%
grade:
ACS reagent
form:
pellets
solubility:
water: soluble

Product Name

Potassium hydroxide, ACS reagent, ≥85%, pellets

InChI key

KWYUFKZDYYNOTN-UHFFFAOYSA-M

InChI

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

SMILES string

[OH-].[K+]

grade

ACS reagent

agency

suitable for EPA 1621
suitable for EPA 1633

vapor pressure

1 mmHg ( 719 °C)

assay

≥85%

form

pellets

impurities

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

pH

~13.5 (25 °C, 5.6 g/L)

mp

361 °C (lit.)

Quality Level

200

solubility

water: soluble

anion traces

chloride (Cl-): ≤0.01%
phosphate (PO43-): ≤5 ppm
sulfate (SO42-): ≤0.003%

cation traces

Ca: ≤0.005%
Fe: ≤0.001%
Mg: ≤0.002%
Na: ≤0.05%
Ni: ≤0.001%
heavy metals: ≤0.001% (by ICP)

application(s)

PFAS testing

storage temp.

room temp

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Application

Potassium hydroxide may be used in the following processes:
  • Conversion of nitriles to amide in tert-butanol.
  • Cross-coupling of aryl halides with different sulfur-, oxygen- and nitrogen-based nucleophiles in dimethyl sulfoxide.
  • As an activator for the preparation of activated carbons from corn cobs.
  • As a base for the N-alkylation of nitrogen heterocycles in polyethylene glycol-ether solvents.
  • Synthesis of (S)-1-(4-benzyl-2-thioxothiazolidin-3-yl)propan-1-one from (S)-phenylalaninol.
  • To catalyze the polymerization of propylene oxide.

General description

Potassium hydroxide is an inorganic salt mainly used as a precursor to synthesize other potassium compounds such as potassium acetate, potassium bicarbonate and potassium carbonate. On a commercial scale, it is synthesized by the electrolysis of potassium chloride.

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

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Certificates of Analysis (COA)

Lot/Batch Number
0000513276
0000513289
MKCZ7506
MKCZ7505
MKCZ6892

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N-Alkylation of pyrrole, indole, and several other nitrogen heterocycles using potassium hydroxide as a base in the presence of polyethylene glycols or their dialkyl ethers
Sukata K
Bulletin of the Chemical Society of Japan, 56(1), 280-284 (1983)
Dimethyl Sulfoxide/Potassium Hydroxide: A Superbase for the Transition Metal-Free Preparation of Cross-Coupling Products
Yuan Y, et al
Advanced Synthesis & Catalysis, 352(17), 2892-2898 (2010)
Potassium acetate by fermentation with Clostridium thermoaceticum
Shah MM, et al.
Applied Biochemistry and Biotechnology (1997)
Ledgard J
The Preparatory Manual of Explosives., 79-79 (2009)
Preparation of high surface area activated carbon from corn by chemical activation using potassium hydroxide
Bagheri N & Abedi J
Chemical Engineering Research and Design, 87(8), 1059-1064 (2009)
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