Description
Buffer solution, technical, pH 4,01, colour-coded red, is a ready-to-use reference standard for pH meter and electrode calibration. The technical-quality buffer is specified at 4,01 ±0,01 pH at 25 °C and is supplied in a 500 ml plastic bottle for routine laboratory use. Colour coding in red helps distinguish this acidic calibration point from other buffer values during multi-point procedures. Each unit includes a certificate of analysis, and the solution is traceable to NIST, supporting documented calibration workflows in analytical and quality-control settings. This colour-coded formulation from manufacturer Hanna Instruments is intended for technical pH calibration where clear visual identification of the buffer is advantageous. The plastic bottle format suits bench-top handling on portable and laboratory instruments. Net weight is 0,61 kg and gross weight is 1,61 kg for the filled pack. The product supports consistent electrode checks in research, industrial and educational laboratories that require defined, easily recognisable pH standards.
This article belongs on pH buffers & conductivity standards, in Buffers & pH solutions.
Key features
- Pack size: 500 ml plastic bottle
- pH value: 4,01 ±0,01 at 25 °C
- Colour: red (colour-coded)
- Quality grade: technical
- Certificate of analysis: included
- Traceability: NIST
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Questions about 4.01 pH Value @25°C, (1) 500 mL bottle
What is this article?
4.01 pH Value @25°C, (1) 500 mL bottle is the article on this page. Luminix Health distributes Hanna Instruments for laboratory use. It sits in pH buffers & conductivity standards, inside Buffers & pH solutions, in Produits chimiques de laboratoire et industriels.
A pH buffer for calibration has a stated pH at a stated temperature, often traceable. A conductivity standard has a stated conductivity. They are not general reagents and they should not be poured back into the bottle. The temperature of the measurement has to be the temperature on the label, or the meter has to compensate.
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 pH buffers & conductivity standards. The catalogue is Produits chimiques de laboratoire et industriels.
Shelves beside this one are Biological buffers (Tris, HEPES, MOPS) and Buffers (other).
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.
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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.