| Formula / Notation | K |
|---|---|
| CAS Number | 7440-09-7 |
| Molecular Weight | 39.1 |
| Melting Point | 63.5 |
| Boiling Point | 759.0 |
| Density | 0.89 |
| Solubility | Reacts violently with water |
| Appearance | Soft, silvery-white metal, rapidly oxidises to grey |
| Also Known As | K, kalium, potassium metal |
| Category | Elements |
What is Potassium?
Potassium is a soft, silvery-white alkali metal, atomic number 19. Highly reactive with water. Essential element for all living organisms - maintains cellular electrical potential and nerve function. Seventh most abundant element in Earth crust.
Formula & Notation
IUPAC Name: Potassium
Other Names / Synonyms: K, kalium, potassium metal
Properties & Characteristics
Physical Data
| Property | Value |
|---|---|
| Melting Point | 63.5 |
| Boiling Point | 759.0 |
| Density | 0.89 |
| Molecular Weight | 39.1 |
| Solubility | Reacts violently with water |
| Appearance | Soft, silvery-white metal, rapidly oxidises to grey |
Uses & Applications
Safety Information
Always consult the SDS/MSDS before handling any chemical. This information is for educational purposes only.
Key Facts
Frequently Asked Questions
Potassium is a soft, silvery-white alkali metal, atomic number 19. Highly reactive with water. Essential element for all living organisms - maintains cellular electrical potential and nerve function. Seventh most abundant element in Earth crust.
Potassium hydroxide (KOH) production. Fertilisers (potassium chloride KCl, potassium sulfate). Potassium nitrate (gunpowder, fertiliser). Biological electrolyte (cardiac function). Potassium permanganate (KMnO4) oxidant. Soap making.
Reacts violently with water: 2K + 2H2O -> 2KOH + H2 (ignites H2 immediately). More reactive than sodium. Store under mineral oil. Causes severe chemical burns. Reacts with oxygen to form K2O2 (explosive with water). Handle with extreme care.
The formula or notation for Potassium is: K