High purity nitrogen
Mineral processing 2025-04-25
| Category | Details |
|---|---|
| Purity | ≥99.999% (5.0 grade) to ≥99.9999% (6.0 grade), with impurities (O₂, H₂O, CO₂ ≤ 0.1 ppm) |
| Key Applications | – Electronics: Carrier gas in semiconductor manufacturing (CVD, etching) |
| – Food & Beverage: Modified atmosphere packaging (MAP) and freezing | |
| – Healthcare: Pharmaceutical freezing/storage and laser surgery | |
| – Chemicals: Inert atmosphere for reactive processes (polymerization) | |
| – Metallurgy: Annealing and heat treatment of metals | |
| Physical Properties | – Colorless, odorless, and non-flammable |
| – Density: 1.2506 g/L at 0°C (slightly lighter than air) | |
| – Liquid form at -196°C (cryogenic) | |
| Safety Precautions | – Asphyxiation Risk: Displaces oxygen in confined spaces; monitor O₂ levels |
| – Cryogenic Hazard: Liquid nitrogen causes severe frostbite (use PPE) | |
| – Avoid enclosed areas without ventilation | |
| Storage & Handling | – Compressed gas cylinders (e.g., 50L, 100L) at 150–200 bar pressure |
| – Liquid nitrogen in vacuum-insulated dewars (up to 10.000 liters) | |
| – Store upright in cool, well-ventilated areas away from combustibles | |
| Certifications | Compliance with ISO 14175 (industrial), USP/Ph. Eur. (medical), and ASTM D4489 |
| Environmental Impact | – Inert and non-toxic; minimal direct environmental impact |
| – Energy-intensive production (cryogenic distillation) |
