PTFE, PFA and Teflon®* Vials are available for maximum chemical compatibility. See our PTFE and Teflon Compatibility Charts for more information. PFA, PTFE and Teflon vials are widely used in the preparation and storage of a variety of samples for sensitive analyses.
Septum Selection Guide Septa for use with general chromatography vials, liquid injection 2-056 PTFE/Natural Red Rubber PTFE Natural Red Rubber are moderately priced seals for GC and HPLC with good chemical properties. They are ideal for multiple injections due to high resealability, but not as easy to penetrate as PTFE/RR.
PTFE Septa * -200 +250 -328 +482 Polyethylene (PE) * -50 +80 -58 +176 Polypropylene (PP) * 0 +121 32 +250 Butyl/Chlorobutyl/Bromobutyl Stopper or Septa -20 +125 -4 +257 Gray PTFE/Red Rubber -40 +120 -40 +248 PTFE/White Silicone PurePack Septa -60 +200 -76 +392 Gray PTFE/Molded Black Butyl (Pharmafix) Septa -20 +125 -4 +257
A specially moulded seal with a PTFE insert. Sealing surface of Butyl and PTFE affects a more positive seal than non-PTFE-faced septa. Ideal choice for temperatures below 125°C. Good sealing characteristics, excellent resistance to most solvents with reduced coring and high puncture tolerance. PTFE provides increased chemical resistance.
Aug 6, 2013 · Tips and Tricks for the Lab: Air-Sensitive Techniques (4) Vacuum/inert gas manifold systems, commonly called Schlenk lines, are ideal for handling compounds that react with O 2, water, or CO 2. Their design allows compounds to be handled and reactions to be performed under an inert atmosphere of argon or nitrogen.
PTFE/Silicone septa are the preferred product for use in most HPLC and GC applications where resealability and high purity are critical. PTFE/Silicone septa are offered in a standard formulation as well as a soft durometer formulation recommended for applications where ease of needle penetration is important PTFE/Silicone/PTFE Septa: (T/S/T)
PTFE does not reseal after being punctured: Silicone: Alcohol, DMF, DMSO, hydrogen peroxide, sodium hydroxide: ACN, benzene, chloroform, hexane, HCL, MEK, THF, toluene: Silicone / PTFE: PTFE chemical resistance until punctured, then septa or liner will have compatibility of silicone: PTFE does not reseal after being punctured: Viton®
United Scientific Supplies. Silicone stoppers are particularly useful due to their inert and nonreactive nature. It will not impair the growth of tissue cultures and resistant to most chemical acids and solvents. Stoppers can be steam sterilized at 15 lbs. pressure. Broad working temperature range of –62 to 232°C.
Bottle Septa. Septa for bottles provide an airtight seal for bottles that prevents environmental contaminants but allows for the removal of the bottle’s contents by piercing with sharp needles. Septa bottle caps are generally available for open-top and screw caps and allow for aseptic syringe dispensing, as well as the addition of materials.
Specially engineered to fit standard taper joints and tubes. Manufactured under white room conditions for extreme cleanliness. Made of a more dense rubber, low extractables and a better fit (50% to 80% on joints) these septa are much less likely to fail in the presence of solvents. Compare this item.
Vial septa are available in a variety of materials. Septa, tan PTFE/silicone (diam. x thickness 8 mm x 1.5 mm) are sized to fit screw top vials. They are suitable for use with most organics (until pierced) and are not recommended for use with chlorosilanes. Compare this item.
Molded Septa are manufactured from high quality, low bleed material that uses the same exclusive LB-2 rubber formulation chromatographers are accustomed to using. Design. Solid Disc. Type. Septa. For Use With (Equipment) Low Bleed GC-MS Columns. Temperature (Metric) Max. 350°C.
Septa A wide range of serrated and non-serrated septa, and sleeve stoppers are available for use as temporary closures for glassware joints, tubes, bottles, NMR tubes, ampules, and cannulation techniques in air-sensitive chemistry.
Description. Minimize contamination from handling with convenient, pre-assembled Thermo Scientific™ 11 mm Autosampler Vial Crimp Caps, compatible with most HPLC and GC autosamplers. Choose from Thermo Scientific™, National™ or Chromacol™ brands. Aluminum crimp seals with prefitted septa fit all 11 mm crimp top and snap cap vials.
