Skip to content
In-stock items ship within 1 working day from the Czech Republic (EU); other items show their lead timeFree samplesRequest a quote
EROHE
EROHE Account Cart

18 mm screw headspace vials (ND18)

10 ml (22.5 × 46 mm) and 20 ml (22.5 × 75.5 mm) precision screw-thread headspace vials with round bottoms, in clear and amber glass.

Products
8
Quick orderPaste SKUs and quantities from your spreadsheet or PO

One line per product: SKU, then the number of packs. Up to 60 lines.

8 of 8 products

Products

Compare 18 mm screw headspace vials (nd18)

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

Screw or crimp headspace vials?

Screw headspace vials close by hand with an 18 mm magnetic screw cap, so no crimper is needed. Crimp vials need a crimper but are the traditional format; use the one your sampler and method specify.

Which cap fits an 18 mm screw headspace vial?

The 18 mm magnetic precision screw caps (ND18), with PTFE/silicone septa.

Why are the caps magnetic?

Many headspace autosamplers move vials with a magnet that picks up the cap.