221473 Sigma-Aldrich

Potassium hydroxide

ACS reagent, ≥85%, pellets

Synonym: Caustic potash



Related Categories ACS Grade Acids & Bases, Acids & Bases, Adsorbents, Filter Aids and Drying Agents, Analytical Reagents, Analytical Reagents for General Use,
grade   ACS reagent
vapor pressure   1 mmHg ( 719 °C)
assay   ≥85%
form   pellets
impurities   ≤0.001% N compounds
  ≤2.0% K2CO3
  10-15% water
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 (as Pb): ≤0.001%


Other Notes

A -D suffix exists for administrative purposes only.
All -D packages are 100% the same product, same quality, same specification as the package sizes previously sold without a -D.


1, 2.5, 4×2.5, 3.5 kg in poly bottle

12 kg in fiber drum

25, 500, 6×500 g in poly bottle

Price and Availability

Suggested Laboratory Gloves

Laboratory GlovesThis substance has been tested against several types of hand protection for CE compliance. Click below to find the recommended gloves for handling this product.

Safety & Documentation

Safety Information


Certificate of Analysis

Certificate of Origin

Protocols & Articles


AOAC First Action Official Method℠ 2015.02

Determination of Sodium Monofluoroacetate in Dairy Powders by Liquid Chromatography Tandem Mass Spectrometry (LC-MS/MS)
Keywords: Chromatography, High performance liquid chromatography, Liquid chromatography mass spectrometry, Mass spectrometry, Rodenticides

Analysis of Vitamin D in Milk and Infant Formula using UHPLC/MS/MS per AOAC Method 2011.11

Fortification of milk, dairy products, infant and adult nutritionals with vitamin D is required in many countries to provide additional dietary vitamin D. The fortification of milk in the USA, for ex...
Olga Shimelis
Reporter US Volume 33.2
Keywords: Chromatography, Evaporation, High performance liquid chromatography, Mass spectrometry, Metabolites, Sample preparations, Saponifications, Separation, Solvents, Vitamins

EPA Method 335.4 Product Selection Guide

This product selection guide is designed to simplify the ordering of products for EPA Method 335.4. This method is for the determination of total cyanide in various water and waste samples.

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