In the management of a university or research laboratory, choosing the right material for consumables is a strategic decision. Although glass remains a key player in many applications, laboratory plastics such as PP (polypropylene), HDPE (high-density polyethylene), and PET (polyethylene terephthalate) have become indispensable alternatives due to their versatility, cost, and ease of use.
In this article, you will discover the main features, advantages, and applications of each one so that you can make the best purchasing decision for your laboratory.
Polypropylene (PP)
PP is one of the most widely used plastics in scientific environments.
- High chemical resistance to solvents, diluted acids, and bases.
- Autoclavable: withstands temperatures of up to 121 °C, allowing for steam sterilization.
- Translucency: facilitates the visualization of volumes and liquids.
- Applications: test tubes, bottles, stoppers, and materials that require reuse under sterile conditions.
High-density polyethylene (HDPE)
HDPE stands out for its durability and low cost.
- High resistance to impact and corrosion.
- Not autoclavable: it deforms at temperatures above 80 °C.
- Lightweight and opaque, which protects light-sensitive samples.
- Applications: storage bottles, drums, containers for reagents and aqueous solutions.
Polyethylene terephthalate (PET)
PET is widely known in packaging, but it also has its role in the laboratory.
- High transparency: allows for a clear observation of the content.
- Moderate resistance to chemicals, suitable for aqueous samples or neutral solutions.
- Not suitable for high temperatures: does not withstand autoclave.
- Applications: sample vials, single-use containers, bottles for safe transport.
Technical comparison
| Property | PP (Polypropylene) | HDPE (High-Density Polyethylene) | PET (Polyethylene Terephthalate) |
|---|---|---|---|
| Chemical resistance | High | High-medium | Medium |
| Thermal resistance | Up to 121 °C (autoclave) | Up to 80 °C | Low (<70 °F) |
| Transparency | Translucent | Opaque | High (crystalline) |
| Sterilization | Autoclavable | No | No |
| Cost | Medium | Low | Low-medium |
| Main uses | Tubes, caps, bottles | Cans, containers, reagents | Bottles, single-use containers |
What plastic to choose for your laboratory?
- If you need reusable and sterilizable material, choose PP, as it withstands autoclaving and maintains good chemical resistance.
- If you are looking for economical and impact-resistant storage, choose HDPE, ideal for large volumes and aqueous solutions.
- If the priority is transparency and clear visibility, choose PET, recommended for samples and single-use containers.
The essentials in a few lines
Selecting the right plastic depends on the type of test, the available budget, and the expected lifespan of the consumable.
At Comercial Labor, we offer a complete range of bottles, jars, and containers made from PP, HDPE, and PET, with quality certifications and tailored to the needs of academic laboratories, research centers, and universities.