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221473 Sigma-Aldrich

Potassium hydroxide

ACS reagent, ≥85%, pellets

Synonym: Caustic potash

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Properties

Related Categories ACS Grade Acids & Bases, Acids & Bases, Adsorbents, Filter Aids and Drying Agents, Analytical Reagents, Analytical Reagents for General Use,
Quality Level   200
grade   ACS reagent
vapor pressure   1 mmHg ( 719 °C)
assay   ≥85%
form   pellets
impurities   ≤0.001% N compounds
  ≤2.0% K2CO3
  10-15% water
pH   ~13.5 (25 °C, 5.6 g/L)
mp   361 °C (lit.)
anion traces   chloride (Cl-): ≤0.01%
  phosphate (PO43-): ≤5 ppm
  sulfate (SO42-): ≤0.003%
cation traces   Ca: ≤0.005%
  Fe: ≤0.001%
  Mg: ≤0.002%
  Na: ≤0.05%
  Ni: ≤0.001%
  heavy metals: ≤0.001% (by ICP-OES)
SMILES string   [OH-].[K+]
InChI   1S/K.H2O/h;1H2/q+1;/p-1
InChI key   KWYUFKZDYYNOTN-UHFFFAOYSA-M

Description

General description

Potassium hydroxide is an inorganic salt mainly used as a precursor to synthesize other potassium compounds such as potassium acetate, potassium bicarbonate and potassium carbonate. On a commercial scale, it is synthesized by the electrolysis of potassium chloride.

Application

Potassium hydroxide may be used in the following processes:
• Conversion of nitriles to amide in tert-butanol.
• Cross-coupling of aryl halides with different sulfur-, oxygen- and nitrogen-based nucleophiles in dimethyl sulfoxide.
• As an activator for the preparation of activated carbons from corn cobs.
• As a base for the N-alkylation of nitrogen heterocycles in polyethylene glycol-ether solvents.
• Synthesis of (S)-1-(4-benzyl-2-thioxothiazolidin-3-yl)propan-1-one from (S)-phenylalaninol.
• To catalyze the polymerization of propylene oxide.

Packaging

1, 2.5, 4×2.5 kg in poly bottle

12 kg in fiber drum

25, 500, 6×500 g in poly bottle

Safety & Documentation

Safety Information

Symbol 
Signal word 
Danger
Hazard statements 
RIDADR 
UN 1813 8 / PGII
WGK Germany 
WGK 1
RTECS 
TT2100000
Flash Point(F) 
Not applicable
Flash Point(C) 
Not applicable

Documents

Certificate of Analysis (COA)

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Certificate of Origin (COO)

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Protocols & Articles

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Peer-Reviewed Papers
15

References

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