Potassium hydroxide
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Synonyms & Trade Names
Caustic potash, Lye [Potassium hydroxide], Potassium hydratePhysical Description
Odorless, white or slightly yellow lumps, rods, flakes, sticks, or pellets. [Note: May be used as an aqueous solution.]Molecular Weight
56.1Boiling Point
2415°FMelting Point
716°FSolubility
(59°F): 107%Vapor Pressure
(1317°F): 1 mmHgIonization Potential
?Specific Gravity
2.04Flash Point
NAUpper Exposive Limit
NALower Explosive Limit
NA
Noncombustible Solid; however, may react with H2O & other substances
and generate sufficient heat to ignite combustible materials.
and generate sufficient heat to ignite combustible materials.
Incompatibilities & Reactivities
Acids, water, metals (when wet), halogenated hydrocarbons, maleic anhydride [Note: Heat is generated if KOH comes in contact with H2O & CO2 from the air.]Exposure Routes
inhalation, ingestion, skin and/or eye contactSymptoms
irritation eyes, skin, respiratory system; cough, sneezing; eye, skin burns; vomiting, diarrheaTarget Organs
Eyes, skin, respiratory systemPersonal Protection/Sanitation
(See protection codes)Skin:Prevent skin contact
Eyes:Prevent eye contact
Wash skin:When contaminated
Remove:When wet or contaminated
Change:Daily
Provide:Eyewash, Quick drench
First Aid
(See procedures)Eye:Irrigate immediately
Skin:Water flush immediately
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations
Not available.
- Page last reviewed:April 11, 2016
- Page last updated:April 11, 2016
- Content source:
- National Institute for Occupational Safety and Health (NIOSH) Education and Information Division