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06103

Potassium hydroxide

technical, ≥85%, powder

Synonym(s):

Caustic potash

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Pack SizeSKUAvailabilityPrice
1 kg

Available to ship TODAYfromMILWAUKEE

$70.50
5 kg

Estimated to ship onMay 26, 2026fromMILWAUKEE

$271.00

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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vapor pressure

1 mmHg ( 719 °C)

Quality Level

200

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+]

InChI

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

InChI key

KWYUFKZDYYNOTN-UHFFFAOYSA-M

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.

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Potassium hydroxide technical, ≥85%, powder

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Potassium hydroxide

grade

technical

grade

puriss.

grade

-

grade

-

assay

≥85%

assay

85-100.5%

assay

≥85%

assay

≥85% KOH basis

Quality Level

200

Quality Level

200

Quality Level

-

Quality Level

200

form

powder

form

pellets

form

pellets

form

pellets

pH

~13.5 (25 °C, 5.6 g/L)

pH

~13.5 (25 °C, 5.6 g/L)

pH

-

pH

~13.5 (25 °C, 5.6 g/L)

anion traces

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

anion traces

chloride (Cl-): ≤50 mg/kg, phosphate (PO43-): ≤10 mg/kg, silicate (as SiO2): ≤100 mg/kg, sulfate (SO42-): ≤20 mg/kg

anion traces

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

anion traces

chloride (Cl-): ≤0.01%, sulfate (SO42-): ≤0.003%

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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
SDBB7519
SDBB3707
SDBB2684
SDBB0329
SDBB0328

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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
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)
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Global Trade Item Number

SKUGTIN
06103-5KG04061833458549
06103-1KG04061838645821

Questions

1–2 of 2 Questions  

  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/418/501/product-dating-information-06-25-mk.pdf

      Helpful?

  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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