Beschreibung
Bottle Rainbow Kit 2 is a pH calibration solution kit containing six bottles of 250 mL each, formulated for reliable electrode and instrument calibration across key measurement points. The kit includes two bottles of pH 4,01 buffer, two bottles of pH 7,00 buffer and two bottles of pH 10,01 buffer, enabling coverage of acidic, neutral and alkaline ranges frequently used in analytical laboratories and process control. These solutions support routine calibration of pH meters and sensors in quality assurance, research, water analysis and industrial applications. Delivered as one complete package of six 250 mL bottles, the kit helps laboratories keep essential calibration standards on hand for uninterrupted workflows. The product is available from manufacturer Mettler-Toledo OnLine and is intended for professional laboratory and online measurement use. Net weight is 1,6 kg and gross weight is 1,8 kg, making the package convenient for storage and daily handling. Produced in Switzerland, Bottle Rainbow Kit 2 forms part of the pH buffer solutions range and provides an organised, ready-to-deploy set of calibration materials for consistent and reproducible pH measurements.
This article belongs on Buffers (other), in Buffers & pH solutions.
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Questions about Bottle Rainbow Kit 2, 6x250mL
What is this article?
Bottle Rainbow Kit 2, 6x250mL is the article on this page. Luminix Health distributes Mettler-Toledo OnLine for laboratory use. It sits in Buffers (other), inside Buffers & pH solutions, in Labor- und Industriechemikalien.
These are buffer solutions and salts that are not a pH calibration standard and not a named biological buffer. The pH, the concentration and the identity of the ions are the specification. A buffer has a capacity. Diluted too far, it is only salty water.
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 Buffers (other). The catalogue is Labor- und Industriechemikalien.
Shelves beside this one are pH buffers & conductivity standards and Biological buffers (Tris, HEPES, MOPS).
What should I check before I order?
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.

