Properties
- Melting point:
- 634 °C (lit.)
- Boiling point:
- 1625 °C
- Density
- 1.00 g/mL at 20 °C
- vapor pressure
- 1.8hPa at 634.5℃
- Flash point:
- 1625°C
- storage temp.
- Poison room
- solubility
- H2O: 1 M at 20 °C, clear, colorless
- form
- Solid
- pka
- 9.36[at 20 ℃]
- color
- White
- Specific Gravity
- 1.52
- PH
- 11-12 (20g/l, H2O, 20°C)
- Water Solubility
- Highly soluble in water. Soluble in methanol, glycerol, and formamide. Slightly soluble in ethanol.
- Sensitive
- Hygroscopic
- Merck
- 14,7626
- BRN
- 4652394
- Exposure limits
- TLV-TWA (measured as CN) skin 5 mg CN/m3 (ACGIH and OSHA); 5 mg CN/m3/ 10 min ceiling (NIOSH).
- Stability:
- Stable. Incompatible with a variety of materials, including acids, iodine, peroxides, permanganates, alkaloids, chloral hydrate, metallic salts. Light and moisture sensitive. Contact with acid generates extremely toxic HCN gas.
- LogP
- -0.252 at 20℃
Safety Information
Use
Potassium cyanide is a white solid or colorless water solution with a faint bitter almond
odor. As a solution, it is slightly soluble in ethanol. It is a poison that reacts with acid or
acid fumes to emit deadly hydrogen cyanide. When heated to decomposition, it emits very
toxic fumes. As a solid, potassium cyanide is incompatible with nitrogen trichloride, perchloryl fl uoride, sodium nitrite, acids, alkaloids, chloral hydrate, and iodine. A synonym
for potassium cyanide is potassium salt of hydrocyanic acid