Vial Septum Selection Guide
| Materials | Compatability | Incompatibility | Resealability | Max. Temp. |
|---|---|---|---|---|
| Red Rubber (synthetic) | acetone, alcohols, DMF, DMSO, ether | ACN, benzene, chloroform, heptane, hexane, pyridine, THF, toluene | very good | 90° |
| PTFE/Natural Rubber | PTFE: resistance until punctured Rubber: acetone, ACN, alcohols, diethylamine, DMF, DMSO, phenol |
aromatics, carbon disulfide, chlorinated solvents, hydrocarbon solvents | very good | 90° |
| PTFE/Silicone PTFE/Silicone/PTFE |
PTFE: resistance until punctured Silicone: acetone, alcohols, DMF, DMSO, ether |
ACN, benzene, chloroform, heptane, hexane, pyridine, THF, toluene | very good | 205° |
| Polyethylene | Good resistance to solvents and weak acids or bases. Unreactive with most chemicals, but some solvents cause softening or swelling. | hydrocarbon solvents | one-time use | 175° |
| Gray Chlorobutyl | acids or bases, water solutions, buffer solutions, oxygenated solvents, vegetable oils | aliphatic or aromatic hydrocarbons, halogenated solvents, mineral oils, strong acids | very good | 100° |
Abbreviations:
ACN - acetonitrile
DMF - dimethylformamide
DMSO - dimethylsulfoxide
THF - tetrahydrofuran
NOTE: This chemical resistance chart is intended only as a guideline. It does not cover all compounds or all solvents. Tests were done at room temperature on pure solvents, and there is no data if two or more compounds are involved. Always confirm the compatibility of your vial, closure, and chemical combination prior to sample preparations.