Yes, you can store oil in plastic, but the suitability largely depends on the type of plastic and the duration of storage.
While plastic containers are a common choice for storing various liquids, including oils, it's crucial to understand that not all plastics are created equal when it comes to long-term oil storage.
The Interaction Between Oil and Plastic
Oils, particularly certain types like rapeseed oil, can interact with plastic over time. Prolonged exposure can lead to several undesirable changes in the plastic itself, affecting both its integrity and the quality of the oil it contains.
- Hazing: The plastic may lose its clarity and become cloudy.
- Stickiness: The surface of the plastic can become tacky or sticky to the touch.
- Discoloration: The plastic might change color, which could also indicate potential leaching of chemicals into the oil.
These issues arise because some oils contain compounds that can slowly degrade certain types of plastic polymers, leading to the breakdown of the material.
Recommended Plastic Types for Oil Storage
For the long-term storage of oils, it is highly recommended to use plastic containers made from specific materials known for their resistance to oil degradation.
| Plastic Type | Suitability for Oil Storage | Key Characteristics |
|---|---|---|
| Polyethylene | Highly Recommended | Excellent chemical resistance, widely used for food-grade containers, prevents haziness and discoloration with oils. |
| Polypropylene | Highly Recommended | Good chemical and heat resistance, durable, often used for containers that need to withstand various substances, including oils. |
| Other Plastics | Not Recommended for Long-Term | May degrade over time, leading to haziness, stickiness, or discoloration, potentially compromising oil quality. |
You should use plastic containers made from materials such as polyethylene or polypropylene for long-term storage of such oils. These plastics are more stable and less reactive when in contact with oils, ensuring the safety and quality of your stored products.
Practical Tips for Oil Storage in Plastic
To ensure safe and effective oil storage in plastic containers:
- Check the Container's Label: Look for recycling symbols and codes, specifically "2" (HDPE - High-Density Polyethylene) or "5" (PP - Polypropylene), which indicate suitable materials.
- Avoid Prolonged Exposure: If unsure about the plastic type, use the container for short-term storage only.
- Store in a Cool, Dark Place: Regardless of the container material, storing oil away from light and heat helps prevent oxidation and spoilage.
By selecting the correct type of plastic container, you can safely and effectively store oils for extended periods without concern for material degradation or oil contamination.
