Due to extreme weather, the Flinn Warehouse is not shipping today, 1/23/2026.
We expect to resume normal shipping on Monday, 1/26/2026.
We regret this inconvenience. For more information, please call us at 800-452-1261.
Price: $18.99
In Stock.
KOH
F.W. 56.11
Hazard Alert
Skin contact causes severe blisters; strongly corrosive as a solid and as a solution; very harmful if swallowed; extremely dangerous to eyes. LD50 273 mg/kg. TLV-C 2 mg/m3.
SPECIAL HAZARD ALERT: Wear appropriate face and body protection when making solutions; potassium hydroxide generates large amounts of heat while dissolving. You might consider immersing your solution-making vessel in an ice bath. The ice bath will better enable you to control the solution temperature. Stir continuously.
This item can only be shipped to schools, museums and science centers