Product Description
When contents are aggressive or analytically sensitive, a PTFE-faced liner protects them from contact with the cap material. These white polypropylene screw caps carry a PTFE/foamed polyethylene liner, combining an inert sealing face with a compressible backing. They are a practical choice for analytical and solvent work.
This listing is for Wheaton catalog number W238520-2400: Polypropylene Screw Cap, White, PTFE/Foamed PE Liner, 24-400, Case of 200. They are available in 13-425, 15-425, 18-400, 20-400, 22-400 and 24-400 finishes to fit a wide range of vials and small bottles. Polypropylene offers durability and good chemical resistance. Caps are packed 200 per case. Match the finish to your vial or bottle for a correct, leak-free fit. Add it to your LIGHT LABS order alongside the rest of your glassware and closures.
Key Features
- PTFE face – Inert surface toward the sample.
- Foamed PE backing – Compresses for a tight seal.
- Six finishes – 13-425 through 24-400.
- Polypropylene construction – Durable and chemically resistant.
Specifications
| Catalog Number | W238520-2400 |
| Brand | Wheaton (DWK Life Sciences) |
| Description | Polypropylene Screw Cap, White, PTFE/Foamed PE Liner, 24-400 |
| Sold As | Case of 200 |
| Material | Polypropylene, white |
| Liner | PTFE/foamed polyethylene |
| Thread finish | 13-425; 15-425; 18-400; 20-400; 22-400; 24-400 |
Available Options
- W238520-1325 – Polypropylene Screw Cap, White, PTFE/Foamed PE Liner, 13-425, Case of 200
- W238520-1525 – Polypropylene Screw Cap, White, PTFE/Foamed PE Liner, 15-425, Case of 200
- W238520-1800 – Polypropylene Screw Cap, White, PTFE/Foamed PE Liner, 18-400, Case of 200
- W238520-2000 – Polypropylene Screw Cap, White, PTFE/Foamed PE Liner, 20-400, Case of 200
- W238520-2200 – Polypropylene Screw Cap, White, PTFE/Foamed PE Liner, 22-400, Case of 200
Applications
- Solvent and chemical storage
- Sample vial closure
- Analytical standard storage
- Replacement caps