| Free shipping on orders over $199 |  |
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: $19.62
In Stock.
Caustic soda, soda lye
NaOH
F.W. 40.00
Hazard Alert
Corrosive solid; skin burns are possible; large amounts of heat evolve when added to water; very dangerous to eyes; wear face and eye protection when using this substance. Wear gloves. TLV 2 mg/m3.
This item can only be shipped to schools, museums and science centers
1-800-452-1261
Sodium Hydroxide