## Common ground
All options are containers designed for storing and transporting chemicals, typically in bulk.
## Options at a glance
**7310.2X – Made of iron or steel**
- **Defining trait:** Constructed from ferrous metal, offering high durability and resistance to physical damage.
- **Typical examples:** Steel drums for corrosive liquids, industrial chemical transport barrels.
- **Best fit when:** High strength, long-term storage, or heavy-duty use is required; common in industrial settings.
**7612.90 – Made of aluminium**
- **Defining trait:** Lightweight and corrosion-resistant, ideal for chemicals that react with iron or steel.
- **Typical examples:** Aluminium drums for reactive chemicals like acids, pharmaceuticals, or food-grade substances.
- **Best fit when:** Weight matters, chemical compatibility is critical, or frequent handling is needed.
## Key differences
| Feature | 7310.2X (Iron/Steel) | 7612.90 (Aluminium) |
|---------------------|------------------------|-----------------------|
| Material weight | Heavy | Light |
| Corrosion resistance| Moderate (requires coating) | High |
| Chemical compatibility | Limited to non-reactive chemicals | Broad, especially with acids and bases |
| Durability | Very high | Good, but softer |
## How to choose
- Is the chemical highly reactive or corrosive? → 7612.90
- Do you need maximum strength and long-term durability? → 7310.2X
- Is weight a major concern during transport or handling? → 7612.90
## Overlaps & pitfalls
A chemical may be compatible with both materials, but aluminium is preferred for reactive substances even if steel could technically hold it. The main function (e.g., safety vs. strength) should guide the choice. If unsure, prioritize chemical compatibility over material strength