Air-Sensitive Glassware

Air Sensitive Storage - Sigma-Aldrich Glassware Catalog


Schlenk-Type  •  Storage  •  Septa  •  Inert Gases & Equipment



On this page:
Break-seal ampuleReaction tubesStorage ampules with septum-inletSure/Stor FlasksCHEM-FLEX transfer lines


Break-seal ampule
4mL with S.T. 14/20 joint and side-arm.

Z12,781-7

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Reaction tubes

Top: 14mm i.d. x 20mm o.d.




Type
L (cm)
Catalog Number
Pyrex
16
Pyrex
32
Quartz
32


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Storage ampules with septum-inlet

Use rubber septa Z10,072-2 (white) or Z23,341-2 (red) on septum-inlet.

Vol. (mL)
Single-inlet
Catalog Number
Dual-inlet
Catalog Number
15
25
50


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Sure/Stor Flasks

Features:
  • High-vacuum PTFE valve-to-glass seal eliminates air contamination in storage and septum leakage after initial needle penetration
  • Heavy-wall borosilicate glass
  • Removable side-arm hose connector for easy attachment of vacuum and inert gas lines. For long term storage, replace hose connector with a rubber septum for secondary protection. Flasks supplied with 2 septa. Order replacement septa, Z10,649-6.
  • Plastic-coated* flasks reduce chance of breakage and contain spills
  • Amber flasks protect light-sensitive products

* The coating is a thermoplastic film that softens appreciably at temperatures above 110°C, becoming less protective. Tests show that the coating is 100% effective in preventing flying glass when a fully evacuated flask is broken.




Sure/Stor Technique
  • Connect flask to vacuum line to pump out air and strong odor, then refill with inert gas
  • Open PTFE valve sufficiently to allow syringe needle (or pipette) to pass through septum-inlet and reach the stored liquid in flask
  • Close the PTFE valve after needle removal and pump out again to remove air and odor (use rubber septa Z10,072-2 or Z12,435-4 on septum-inlet)
  • For long-term storage, replace hose connector with a rubber septum for secondary protection
Cap (mL)
Clear glass
Catalog Number
Plastic-coated glass
Catalog Number
Amber glass
Catalog Number
25
50
100
250
500
1,000
2,000


Replacement septa

For long term storage, replace hose connector with a rubber septum for secondary protection. PTFE-faced silicone rubber. Package of 100.

Z10,649-6

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CHEM-FLEX transfer lines

These ready-to-use transfer lines incorporate CHEM-FLEX 106 tubing which has a chemically-inert, thin-wall PTFE inner tube sheathed in clear PVC for extra strong, flexible lines that are resistant to crushing or kinking. Two 12 gauge SS needles (6 and 18in.) are connected to the CHEM-FLEX 106 tubing with nylon clamps. Liquids contact only PTFE and SS during transfers.

Note: For extra security when using large bore transfer needles, fasten septum to bottle or flask opening with a wrap-it tie.




Tubing L (in.)
Catalog Number
30
60
120

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