Description
LABOCAP-caps without handle, violet, are metal closures designed for glass culture vessels with a diameter of 12/13 mm. Produced from chrome-nickel steel, they form a sturdy, handle-free seal for culture vials used in microbiology, molecular biology and cell culture. Omitting the handle yields a compact profile that favours dense rack storage and easy manipulation of tubes and vials during everyday lab work. Violet colour coding enables quick visual identification of samples, media or process steps when several cultures are run in parallel. Each pack comprises 100 pc(s) at a total weight of 0,350 kg, a practical unit for replenishing culture-vial accessory stocks. These LABOCAP-caps from manufacturer ROTH SELECTION are intended for glassware in the 12/13 mm range and function as accessories in standard culture-vial workflows. The chrome-nickel steel build supplies mechanical robustness for repeated laboratory use. Together with other culture-vial accessories, they support clear, colour-coded organisation of samples in research and routine analytical laboratories.
This article is part of Biological buffers (Tris, HEPES, MOPS), in Buffers & pH solutions.
Key features
- Pack size: 100 pc(s)
- Product type: LABOCAP-caps without handle
- Colour: Violet
- Material: Chrome-nickel steel
- Suitable for: Glass Ø 12/13 mm
- Weight: 0,350 kg
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Questions about LABOCAP-caps without handle, violet, chrome-nikkel steel, f. glass. Ø 12/13mm
What is this article?
LABOCAP-caps without handle, violet, chrome-nikkel steel, f. glass. Ø 12/13mm is the article on this page. Luminix Health distributes Carl Roth for laboratory use. It sits in Biological buffers (Tris, HEPES, MOPS), inside Buffers & pH solutions, in Lab chemicals.
Tris, HEPES, MOPS and their relatives hold pH in a range that cells and proteins tolerate, with a pKa near the working pH. The useful range is roughly one unit either side of the pKa. A phosphate buffer and Tris are not interchangeable in a method that names one of them, because the ion itself has effects.
A buffer resists a change in pH when a little acid or base is added. It does that because a weak acid and its conjugate base are both present. A pH buffer used to calibrate a meter has a stated value at a stated temperature. A biological buffer such as Tris or HEPES is chosen because it holds the pH of a living system and does not poison it. Conductivity standards are the sister articles for a conductivity meter. The ions are on PubChem. Electrode calibration practice sits with EURAMET and BELAC.
Which category should I open next?
The category is Buffers & pH solutions. The sub-category is Biological buffers (Tris, HEPES, MOPS). The catalogue is Lab chemicals.
Shelves beside this one are pH buffers & conductivity standards and Buffers (other).
What should I check before I order?
The technical information on this page is the manufacturer's sheet. Read that, not a rewritten specification.
When this page shows a safety data sheet, use that manufacturer file. Hazard text does not belong in the sales description. For a pack size, a grade or a certificate that is not on the page, send a quote request or contact the team.
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Luminix Health distributes this article from the heart of Europe. Articles in stock ship within 2–5 business days. Standard delivery is free from €250 excl. VAT. Cold-chain goods and dangerous goods under ADR are never included in that free delivery. The terms are in the Shipping Policy. The full brand index is on shop by brand. Who we are is on about us.
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The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.

