484016

Potassium hydroxide

reagent grade, 90%, flakes

• Synonym(s): Caustic potash
• 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: 329757370
• NACRES: NA.21

Properties

• grade: reagent grade
• Agency: suitable for EPA 1613; suitable for SM 5210
• vapor pressure: 1 mmHg ( 719 °C)
• Assay: 90%
• form: flakes
• pH: ~13.5 (25 °C, 5.6 g/L)
• mp: 361 °C (lit.)
• solubility: water: soluble 1120 g/L
• SMILES string: [OH-].[K+]
• InChI: 1S/K.H2O/h;1H2/q+1;/p-1
• InChI key: KWYUFKZDYYNOTN-UHFFFAOYSA-M

Description

General description

Potassium hydroxide (KOH) is a hygroscopic, water soluble base synthesized by the electrolysis of potassium chloride solution. It is the raw material for the synthesis of many potassium compounds. KOH reacts with CO₂ to form potassium carbonate. This property can be utilized to absorb CO₂. It participates as catalyst in aldol condensation reactions. KOH anisotropic etching of silicon is used for the fabrication of sub-micron silicon nitride waveguides using conventional contact lithography. Pulverized KOH may be used for the preparation of chalcones.

Application

Potassium hydroxide (KOH) was used in the following processes:

• Quantification of glutathione (GSH) and glutathione disulfide (GSSG) in biological samples by HPLC.
• Preparation of buffer for use in the Investigation of seed fatty acid (FA) composition, protein, oil and sugar content.
• Stable isotopic profiling study of Caenorhabditis elegans.

Potassium hydroxide may be employed as an etchant for the laser modified glass. In combination with tellurium powder, it mediates the quantitative pinacolization of aromatic carbonyl compounds.

Safety Information

• Pictograms: GHS05,GHS07
• Signal Word: Danger
• Hazard Statements: H290,H302,H314
• Precautionary Statements: P234 - P260 - P280 - P301 + P312 - P303 + P361 + P353 - P305 + P351 + P338
• Hazard Classifications: Acute Tox. 4 Oral - Eye Dam. 1 - Met. Corr. 1 - Skin Corr. 1A
• Storage Class Code: 8B - Non-combustible corrosive hazardous materials
• WGK: WGK 1
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable