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06103

Sigma-Aldrich

Potassium hydroxide

technical, ≥85%, powder

Synonym(s):

Caustic potash

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1 KG
¥12,200
5 KG
¥32,100

About This Item

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

¥12,200

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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

SMILES string

[OH-].[K+]
[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 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

Signal Word

Danger

Hazard Statements

H290,H302,H314

Hazard Classifications

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

Storage Class Code

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.

ISHL Indicated Name

Substances Subject to be Indicated Names

ISHL Notified Names

Substances Subject to be Notified Names

JAN Code

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

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Certificates of Analysis (COA)

Lot/Batch Number
SDBB2684
SDBB0329
SDBB0328
SDBB0669
STBK7922

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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
Rokas Drevinskas et al.
Optics express, 23(2), 1428-1437 (2015-04-04)
Surface texturing is demonstrated by the combination of wet etching and ultrafast laser nanostructuring of silica glass. Using potassium hydroxide (KOH) at room temperature as an etchant of laser modified glass, we show the polarization dependent linear increase in retardance
Aldol condensation in gaseous phase by zeolite catalysts.
Wierzchowski PT and Zatorski LW.
Catalysis Letters, 9(5-6), 411-414 (1991)
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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  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
      For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
      For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
      For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/449/386/product-dating-information-mk.pdf

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  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf

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