Product Description
Drawing samples by syringe without removing the cap protects volatile and sensitive contents from loss and contamination. These open top polypropylene caps expose the septum for needle access, while a bonded PTFE-faced silicone liner keeps the seal intact between draws.
This listing is for Wheaton catalog number W240851: Polypropylene Open Top Screw Cap, 15-425, Black, Case of 1,000. Liners are 0.055 in. (1.4 mm) silicone with 0.005 in. (0.14 mm) PTFE, bonded to the cap so they stay in place. Caps are autoclavable and come in 13-425, 15-425, 22-400 and 24-400 finishes, in white or in black with pre-slit liners for easier penetration. They suit storage of volatile solvents, sensitive compounds and corrosive chemicals. LIGHT LABS supplies the complete DWK Life Sciences line, including Kimble, Wheaton and DURAN labware.
Key Features
- Open top – Syringe access without removing the cap.
- Bonded liner – PTFE/silicone stays in place in the cap.
- PTFE face – Resists volatile solvents and corrosive chemicals.
- Pre-slit option – Black caps with slit liners ease penetration.
- Autoclavable – Can be steam sterilized.
Specifications
| Catalog Number | W240851 |
| Brand | Wheaton (DWK Life Sciences) |
| Description | Polypropylene Open Top Screw Cap, 15-425, Black |
| Sold As | Case of 1,000 |
| Material | Polypropylene |
| Style | Open top |
| Liner | Bonded PTFE-faced silicone |
| Liner thickness | 0.055 in. (1.4 mm) silicone, 0.005 in. (0.14 mm) PTFE |
| Thread finish | 13-425; 15-425; 22-400; 24-400 |
| Colors | White; black |
| Autoclavable | Yes |
Available Options
- W240840 – Polypropylene Open Top Screw Cap, 13-425, White, Bonded PTFE Silicone, Case of 250
- W240841 – Polypropylene Open Top Screw Cap, 13-425, White, Bonded PTFE Silicone, Case of 1,000
- W240842 – Polypropylene Open Top Screw Cap, 15-425, White, Case of 250
- W240843 – Polypropylene Open Top Screw Cap, 15-425, White, Case of 1,000
- W240844 – Polypropylene Open Top Screw Cap, 22-400, Case of 100
- W240845 – Polypropylene Open Top Screw Cap, 22-400, Case of 500
- W240846 – Polypropylene Open Top Screw Cap, 24-400, Case of 100
- W240847 – Polypropylene Open Top Screw Cap, 24-400, Case of 500
- W240848 – Polypropylene Open Top Screw Cap, 13-425, Black, Pre-Slit Bonded PTFE Silicone, Case of 250
- W240849 – Polypropylene Open Top Screw Cap, 13-425, Black, Pre-Slit Bonded PTFE Silicone, Case of 1,000
- W240850 – Polypropylene Open Top Screw Cap, 15-425, Black, Case of 250
- W242710 – Polypropylene Open Top Screw Cap, 13-425, Black, Bonded PTFE Silicone, Case of 250
Applications
- Volatile solvent storage
- Sensitive compound retrieval
- Corrosive chemical storage
- Autosampler and headspace vials
