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: $18.55
In Stock.
Potassium hexacyanoferrate(II)
K4Fe(CN)6•3H2O
F.W. 422.41
Hazard Alert
Dangerous if heated or if in contact with concentrated acids since hydrogen cyanide gas may evolve. Slightly toxic by ingestion. LD50 (for anhydrous salt) 6400 mg/kg.
This item can only be shipped to schools, museums and science centers
1-800-452-1261
Potassium Ferrocyanide