Plastic tubing is commonly made from which polymer?

• A. Polyvinyl chloride
• B. Polyethylene
• C. Polypropylene
• D. Polystyrene

Answer: (A)

Plastics for tubing are chosen for a balance of flexibility, visibility, chemical resistance, and cost. Polyvinyl chloride fits this well because it can be made very flexible (with plasticizers) or more rigid, is clear so you can see the contents, resists many common chemicals, and is inexpensive to produce and work with. This combination makes it the go-to material for many types of plastic tubing used in laboratory and medical settings.

Polyethylene tubing is also used, but it is typically chosen for simpler, lower‑pressure lines and may not offer the same level of clarity or chemical compatibility as PVC. Polystyrene is too brittle for tubing, and polypropylene is often less flexible, making it less ideal where bendable, soft tubing is needed.