Description
LABOCAP-caps without handle, violet, are chrome-nickel steel screw-style closures for glass culture vessels with a neck diameter of 17/18 mm. Their handle-free construction keeps the cap compact, which is advantageous when vials are packed tightly in racks, incubators or cold storage. The violet finish enables straightforward colour coding of strains, media lots or experimental conditions in microbiology, molecular biology and cell-culture work. Each pack holds 100 pieces and weighs 0,500 kg, giving laboratories a practical quantity for daily culture-vial use and stock replenishment. These LABOCAP accessories from manufacturer ROTH SELECTION are specified for 17/18 mm glassware and integrate into common culture-vial setups without additional fittings. Robust metal build supports repeated bench handling, while violet identification helps prevent mix-ups when multiple series run in parallel. Suitable as spare or working caps for culture vials and similar glass containers, they assist organised sample management from preparation through incubation and downstream processing in research and quality-control 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
- Fits glass Ø: 17/18 mm
- Weight: 0,500 kg
Recently viewed
You may also like
Browse related categories
Category
Sub-category
Biological buffers (Tris, HEPES, MOPS)
Catalogue
Brand
Questions about Screw caps LABOCAP for 17/18 mm, violet
What is this article?
Screw caps LABOCAP for 17/18 mm, violet 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.
How does ordering and shipping work?
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.
Which other categories should I open?
The seven catalogues are Labware, Lab chemicals, Lab instruments, Lab consumables, Chromatography equipment, Lab safety equipment and Life Science & Microbiology.