| Formula / Notation | N2 |
|---|---|
| CAS Number | 7727-37-9 |
| Molecular Weight | 14.01 |
| Melting Point | -210.0 |
| Boiling Point | -195.8 |
| Density | 0.00125 |
| Solubility | Slightly soluble (14 mg/L at 25 C) |
| Appearance | Colourless, odourless diatomic gas; liquid is colourless |
| Also Known As | N2, nitrogen gas |
| Category | Elements |
What is Nitrogen?
Nitrogen is a colourless, odourless diatomic gas, atomic number 7, comprising 78% of Earth atmosphere. The N triple bond is one of the strongest in chemistry. Essential for all living organisms as component of proteins and nucleic acids.
Formula & Notation
IUPAC Name: Dinitrogen
Other Names / Synonyms: N2, nitrogen gas
Properties & Characteristics
Physical Data
| Property | Value |
|---|---|
| Melting Point | -210.0 |
| Boiling Point | -195.8 |
| Density | 0.00125 |
| Molecular Weight | 14.01 |
| Solubility | Slightly soluble (14 mg/L at 25 C) |
| Appearance | Colourless, odourless diatomic gas; liquid is colourless |
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
Nitrogen is a colourless, odourless diatomic gas, atomic number 7, comprising 78% of Earth atmosphere. The N triple bond is one of the strongest in chemistry. Essential for all living organisms as component of proteins and nucleic acids.
Ammonia production (Haber process - fertilisers). Inert atmosphere for reactive chemical handling. Liquid nitrogen for cryogenic preservation. Food packaging. Electronics manufacture. Cryosurgery. Metal nitriding.
Asphyxiation hazard in enclosed spaces - displaces oxygen, no odour warning. Liquid nitrogen: -196 C, cryogenic burns. Oxygen-deficient atmospheres cause rapid unconsciousness. Pressurised cylinders: mechanical hazard.
The formula or notation for Nitrogen is: N2