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Merck

06103

Potassium hydroxide

technical, ≥85%, powder

Synonym(s):

Caustic potash

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About This Item

Linear Formula:
KOH
CAS Number:
1310-58-3
Molecular Weight:
56.11
UNSPSC Code:
12352106
eCl@ss:
38100303
PubChem Substance ID:
329748211
EC Number:
215-181-3
NACRES:
NA.21
MDL number:
MFCD00003553
Assay:
≥85%
Form:
powder

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InChI

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

InChI key

KWYUFKZDYYNOTN-UHFFFAOYSA-M

vapor pressure

1 mmHg ( 719 °C)

grade

technical

assay

≥85%

form

powder

impurities

≤0.002% heavy metals (as Pb), ≤1.0% K2CO3

pH

~13.5 (25 °C, 5.6 g/L)

mp

361 °C (lit.)

anion traces

chloride (Cl-): ≤1000 mg/kg, sulfate (SO42-): ≤50 mg/kg

cation traces

Fe: ≤20 mg/kg

Quality Level

200

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General description

Potassium hydroxide is an inorganic compound with the chemical formula KOH. It is a strong base and is commonly known as caustic potash. Caustic potash is mainly used for making potassium salts, acid-base titrations, and organic synthesis. Furthermore, KOH can be used as an electrolyte in some fuel cells and alkaline batteries. Potassium hydroxide readily reacts with acids. It is used in various reactions such as nucleophilic, addition, and basic hydrolysis reactions. Additionally, it is employed as a catalyst for aldol-type reactions.

Application

Potassium hydroxide can be used:
  • To prepare KOH treated powder activated carbon, which is used as a catalyst for the synthesis of CNT (carbon nano tube) using chemical vapor deposition (CVD) method.
  • As a base in the intramolecular N-arylation of urea′s to form benzimidazol-2-ones.
  • As a catalyst for the synthesis of khellactone-type compounds (10-aryl substituted-9,10-dihydropyrano[2,3-h] benzopyrone-8-ones) via one-pot, three-component (Meldrum′s acid, aryl aldehydes and 5,7-dihydroxy benzopyrone derivatives) reaction.

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

06103-1KG:4548173333243 + 06103-5KG:4548173333250 + 06103-VAR: + 06103-BULK: + 06103-25KG: + 06103-4X5KG:

jan

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Certificates of Analysis (COA)

Lot/Batch Number
STBK6308
STBK5705
STBK4993
STBK4319
STBK3639

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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)
Aldol condensation in gaseous phase by zeolite catalysts.
Wierzchowski PT and Zatorski LW.
Catalysis Letters, 9(5-6), 411-414 (1991)
Ji-Tai Li et al.
Ultrasonics sonochemistry, 9(5), 237-239 (2002-10-10)
Claisen-Schmidt condensation of acetophenone with aromatic aldehydes catalyzed by pulverized KOH and KF-Al2O3 results chalcones in 52-97% and 83-98% yields respectively in alcoholic solvent under ultrasound irradiation.
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