Potassium hydroxide
Synonyms & Trade Names
Caustic potash, Lye [Potassium hydroxide], Potassium hydrate
Exposure Limits
Measurement Methods
Physical Description
Odorless, white or slightly yellow lumps, rods, flakes, sticks, or pellets.
[Note: May be used as an aqueous solution.]
Molecular Weight
56.1
Boiling Point
2415°F
Melting Point
716°F
Solubility
(59°F): 107%
Vapor Pressure
(1317°F): 1 mmHg
Ionization Potential
?
Specific Gravity
2.04
Flash Point
NA
Upper Explosive Limit
NA
Lower 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 contact
Symptoms
irritation eyes, skin, respiratory system; cough, sneezing; eye, skin burns; vomiting, diarrhea
Target Organs
Eyes, skin, respiratory system
Personal 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
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
Eye:Irrigate immediately
Skin:Water flush immediately
Breathing:Respiratory support
Swallow:Medical attention immediately
Respirator Recommendations
Not available.
See also
INTRODUCTION
ICSC CARD: 0357
Page last reviewed: October 30, 2019
Content
source: National Institute for Occupational Safety and Health