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Vial, Closure and Septa Selection Guide
Use this as a guide to selecting the products you need. For technical assistance, contact Supelco Technical Service at (800) 359-3041 or e-mail us at techservice@sial.com.
| Vial Varieties |
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ABC Screw Top Vials
These vials have a unique thread design that allows you to screw on the caps, and still use them in a robotic autosampler. |
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LVI Vials.
These large opening vials have a 0.3 mL cone-shaped insert. |
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Screw Top Vials.
These standard and large opening vials are available in both clear and amber glass. They come with a variety of closures and septa. |
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Crimp Top Vials.
These standard and large opening vials are used with aluminum seals. The 11 mm aluminum seals have 6 mm openings. |
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Shell Vials.
Cylindrical shell vials compatible with plug-style needle closures to make syringe extraction easier. |
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Snap-Top Vials.
For use with snap ring seals as well as standard aluminum seals. |
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| Cap Varieties |
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Phenolic hole cap
Temp. limit 149°C |
Polypropylene hole cap
Temp. limit 135°C |
Phenolic solid cap w/Teflon seal
Temp. limit 205°C |
Polypropylene solid cap w/aluminum seal
Temp. limit 135°C |
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| Selecting Screw Top Vials and Components |
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| Volume |
Vial O.D. x height |
Cap Thread
(GCMI Spec.) |
Septum
Diameter |
| 2 mL (0.5 drams) |
12 x 32 x 4.6 (I.D.) mm |
8-425 |
8 mm |
| 2 mL (0.5 drams) |
12 x 32 x 6.0 (I.D.) mm |
10-425 |
10 mm |
| 4 mL (1 dram) |
15 x 45 mm |
13-425 |
11 mm |
| 7 mL (2 drams) |
17 x 60 mm |
15-425 |
13 mm |
| 15 mL (4 drams) |
21 x 70 mm |
18-400 |
16 mm |
| 22 mL (6 drams) |
23 x 85 mm |
20-400 |
18 mm |
| 40 mL (10.7 drams) |
29 x 81 mm |
24-400 |
22 mm |
| 40 mL (10.7 drams) |
28 x 98 mm |
24-400 |
22 mm |
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| Compatibility/Incompatibility of Septa |
Barrier (maximum temp. 350 °C)
Silicone bonded to aluminum. Use in sealing applications where non-permeability and low volatility are required at temperatures above 177 °C. Affected by many organic solvents (see examples under Silicone). |
Butyl (maximum temp. 200 °C)
Use with many organic solvents: acetic acid (<50%), acetonitrile, acetone, alcohols, DMSO, phenol. Not compatible with alkanes, benzene, carbon disulfide, chlorinated solvents, cyclohexane. |
Red rubber (maximum temp. 100 °C)
Use with many hydrocarbons, acetonitrile, alcohols, cyclohexane. Not compatible with chlorinated solvents. |
Silicone (maximum temp. 250 °C)
Use with acetone, alcohols, DMSO, ether, aqueous samples. Affected by many organic solvents: acetonitrile, benzene, chloroform, hexane, pyridine, tetrahydrofuran, toluene. |
Teflon/Rubber (maximum temp. 100 °C)
Use with most organics (until pierced). Resistant to chlorosilanes. |
PTFE/Teflon/Silicone (maximum temp. 250 °C)
Use with most organics (until pierced). Not recommended for use with chlorosilanes. |
PTFE/Thermoseal (maximum temp. 300 °C)
An improved grade of silicone septa that can be used at higher temperatures. Affected by many organic solvents (see examples under Silicone). |
Viton (maximum temp. 260 °C)
Resists mineral oil, aliphatic and aromatic hydrocarbons, high concentrations of acids, high temperatures. Not compatible with strong bases, ketones, low molecular weight ester |
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| Durometer is the measurement of the hardness of the septum material. The higher the durometer number the harder the septa will be. Conversely the lower the number, the softer the septa material will be. |
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