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8 and 12 ml screw vials (ND15)

8 ml (16.6 × 60 mm) and 12 ml (18.5 × 65 mm) glass screw vials with a 15-425 thread, in clear and amber glass.

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Compare 8 and 12 ml screw vials (nd15)

Rows that differ are in bold.

Start from your autosampler: it decides the vial size and neck. Then pick the glass colour and the cap.

Step 1: Neck size and closure

NeckClosureTypical use
9 mm short thread (9-425)Screw cap with septumThe most common HPLC format; wide opening, easy to fill
8 mm (8-425)Screw cap with septumOlder and some specific autosamplers
10 mm (10-425)Screw cap with septumSpecific autosampler models
11 mm crimp or snapAluminium crimp cap or snap capGC and volatile samples (crimp seals tightest)
18 mm and 20 mmMagnetic screw or crimp capHeadspace GC

Standard 2 ml vials measure 11.6 × 32 mm (often written 12 × 32 mm). Check the vial format in your autosampler manual; a free sample lets you test the fit in your rack.

Step 2: Clear or amber glass

Use amber glass for light-sensitive compounds. Use clear glass for everything else, so you can see the fill level and any particles.

Step 3: Caps and septa

PTFE/silicone septa suit most HPLC and GC work and reseal for repeat injections. Pre-slit septa reduce needle wear and stop a vacuum forming in the vial. Order caps and vials together: on EROHE, equal packs of 9 mm vials and caps get 5% off both.

Step 4: Small sample volumes

For volumes under 1 ml, use a glass insert in a standard vial, or a vial with a built-in conical insert, so the needle can still reach the sample.

Questions buyers ask

Which cap fits a 15-425 vial?

15 mm screw caps (ND15), available with a centre hole or closed top and PTFE/silicone septa.

8 ml or 12 ml: how do I choose?

Choose by the volume you need to hold plus headspace, and by the height your rack or instrument takes: the 8 ml vial is 60 mm tall and the 12 ml vial 65 mm.

Can these vials be used on an autosampler?

Only on autosamplers or samplers that accept vials of these dimensions; check your instrument's vial specification.