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757551

Sigma-Aldrich

Potassium hydroxide

anhydrous, ≥99.95% trace metals basis

Synonym(s):

Caustic potash

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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:
12352302
PubChem Substance ID:
329766684
NACRES:
NA.23
grade:
anhydrous
form:
crystals or chunks
powder and chunks
powder or crystals
solubility:
H2O: soluble 1120 g/L
Pricing and availability is not currently available.

grade

anhydrous

Quality Level

100

vapor pressure

1 mmHg ( 719 °C)

Assay

≥99.95% trace metals basis

form

crystals or chunks
powder and chunks
powder or crystals

impurities

≤500.0 ppm Trace Metal Analysis

mp

361 °C (lit.)

solubility

H2O: soluble 1120 g/L

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) is also known as caustic potash. It is a strong alkali or a solid base compound that can be used in a variety of industrial applications. It finds its usage in the production of soaps, cleaners and detergents.[1]

Application

  • Biodiesel Production from Waste Cooking Oil: Describes the use of potassium hydroxide in biodiesel production, emphasizing its effectiveness in catalyzing the transesterification of waste cooking oil (K Komaladevi, R Pandithurai, 2023).
  • Chemical Activation for Dye Adsorption: Utilizes potassium hydroxide in the activation process to enhance the adsorption capacity of hemp-based activated carbon, crucial for environmental cleanup and management (Y Toptaş, B Yavuz, A Aksoğan Korkmaz, et al., 2024).
  • Surface Modification of Raphia Fibres: Highlights the use of potassium hydroxide for the chemical modification of Raphia fibres to improve their mechanical properties and water absorption, relevant in textile and material engineering (I Omemereyore, OT Uzoma, et al., 2024).
  • High-Performance Supercapacitors: Discusses the role of potassium hydroxide in enhancing the charge storage performance of electrodes, critical for the development of advanced energy storage systems (Y Pei, Z Ren, X Wu, et al., 2024).

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

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Certificates of Analysis (COA)

Lot/Batch Number
0000410060
0000410061
0000410060
0000410061
0000329458

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The many uses of Potassium Compounds
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Channelrhodopsin (ChR) is a light-gated cation channel that responds to blue light. Since ChR can be readily expressed in specific neurons to precisely control their activities by light, it has become a powerful tool in neuroscience. Although the recently solved
Ashok R Patel et al.
Journal of agricultural and food chemistry, 63(19), 4862-4869 (2015-05-02)
The aim of this study was to use a detailed rheological characterization to gain new insights into the gelation behavior of natural waxes. To make a comprehensive case, six natural waxes (differing in the relative proportion of chemical components: hydrocarbons
Nilesh M Agalave et al.
Pain, 155(9), 1802-1813 (2014-06-24)
Extracellular high mobility group box-1 protein (HMGB1) plays important roles in the pathogenesis of nerve injury- and cancer-induced pain. However, the involvement of spinal HMGB1 in arthritis-induced pain has not been examined previously and is the focus of this study.
Peng Li et al.
Angewandte Chemie (International ed. in English), 54(2), 574-577 (2014-11-15)
Self-assembly of a trigonal building subunit with diaminotriazines (DAT) functional groups leads to a unique rod-packing 3D microporous hydrogen-bonded organic framework (HOF-3). This material shows permanent porosity and demonstrates highly selective separation of C2H2/CO2 at ambient temperature and pressure.
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Questions

1–2 of 2 Questions  

  1. 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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  2. 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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