Order early for pre-holiday delivery. Flinn will be closed December 24th, 2025,
through January 4th, 2026, reopening Monday, January 5th, 2026.
Orders received after 10:30 AM Central Time on Tuesday, December 23rd, 2025,
will ship after we return.
Price: $57.97
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