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DualSeal (Double cap)
In December 2017, we introduced our newly developed double cap system "DualSeal" for moisture/oxygen sensitive products allowing you to keep them in good condition until the last drop. We will continuously increase our usage of DualSeal across our product portfolio.
Features of DualSeal
- Air-sensitive reagents can be safely dispensed without exposure to air
- Even after piercing the septum cap, the PTFE sheet on the blue cover cap provides sealing protection.
- Easy to dispose of caps and bottles separately
How to use DualSeal
DualSeal consists of two parts; the blue outer cap and the white septum cap both of which can be screwed on and off.
No additional sealing is required after piercing the septum cap with a needle. Just screw the outer-cap back in place.
The blue cap has a convex structure on the inside.
By filling the space where air and moisture stay, the material is protected from moisture and oxygen even after piercing the septum cap with a needle.
The white septum cap has a wide septum surface for ease of use, and features two layers of rubber and a highly chemically resistant PTFE seal.
The septum cap body is made of polypropylene and contains a screw thread allowing for easy removal from the bottle. The septum cap is closed with high torque to ensure an airtight seal.
How to use DualSeal
- Clamp and secure the reagent bottle before opening.
- Carefully unscrew the blue outer cap only. Place the cap near the bottle while in use.
- To prevent air from entering the container, insert a needle with a balloon filled with an inert gas such as argon or nitrogen. Then insert a syringe needle through the septum surface of the white cap.
- Fill the syringe with the required amount of liquid.
- Remove the syringe, inject the liquid into your reaction vessel and safely dispose of the needle.
- Take the blue cap and screw it tightly back in place.
- Unclamp the DualSeal bottle and place it in its proper storage location.
• Repeated use can lead to increasing the number of holes or increasing the size of existing holes and will over time lead to an increase in air leakage. To prevent deterioration of the septum, reduce the number of injections as much as possible, or purchase a smaller bottle size.
How to remove the septum cap
Open the septum cap only when all of the liquid has been used up and you want to prepare for the disposal of the bottle.
- Clamp and secure the bottle before opening.
- Open the septum cap by unscrewing.
The septum-cap is tightly closed with high torque to ensure airtightness. Using tools such as water pump pliers is recommended.
• Do not remove the septum cap without having emptied the bottle first.
• Take extra care to avoid any spillage from your syringe.
Notes on bottle disposal
The cap and bottle can be separated for disposal.
- Remove DualSeal by referring to "How to remove the septum cap"
- Highly reactive reagents may be residing inside the cap. Please take the necessary precautions to avoid accidents due to exposure to oxygen or moisture.
- Dispose of the bottle and the caps separately after ensuring that no chemical residue is left behind.
Examples of products using DualSeal
Metallic Salt Solutions
|D3478||Dichloromethane Anhydrous (stabilized with 2-Methyl-2-butene)||500mL|
|D3479||Diethyl Ether Anhydrous (stabilized with BHT)||500mL|
|T2394||Tetrahydrofuran Anhydrous (stabilized with BHT)||500mL|
How to identify DualSeal packaging before placing an order
All products using DualSeal have a note in the "Packaging and Container" section on our Product Details page.
Inquiry about DualSeal
DualSeal caps alone are not offered for sale.
Please feel free to send us your questions about DualSeal.