Description
CAPS is a zwitterionic Good’s buffer salt supplied as PUFFERAN® grade with a minimum purity of 99 %. It is registered under CAS number 1135-40-6 and EG number 214-492-1, with the empirical formula C₉H₁₉NO₃S, a molar mass of 221,32 g/mol and a density of 1,301 g/cm³. CAPS is widely employed in molecular biology and biochemical buffer systems that need reliable pH control in the alkaline range, including protein electrophoresis, enzymatic work and other aqueous preparations. provides a practical quantity for routine buffer formulation and laboratory-scale experiments. CAPS from manufacturer Carl ROTH combines defined purity with complete identity data, supporting reproducible recipes and straightforward documentation in life-science and molecular biology workflows where a high-purity sulfonic acid buffer component is required.
This article belongs on Biological buffers (Tris, HEPES, MOPS), in Buffers & pH solutions.
Key features
- Appearance: white powder
- Assay (N): ≥99.0 %
- Water: ≤1.0 %
- pH value (1 % in H2O): 4.5-6.0
- Solubility (5 % in H2O): clear, soluble
- 280 nm: ≤0.1
- 250 nm: ≤0.1
- CAS number: 1135-40-6
- Pack sizes: 25 g, 250 g, 100 g
- EG nr.: 214-492-1
- Purity: min. 99 %
- Molar mass: 221,32 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
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Biological buffers (Tris, HEPES, MOPS)
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Produits chimiques de laboratoire et industriels
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Questions about CAPS, PUFFERAN®, min. 99 %, 25 g, plastic
What is this article?
CAPS, PUFFERAN®, min. 99 %, 25 g, plastic 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 Produits chimiques de laboratoire et industriels.
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 Produits chimiques de laboratoire et industriels.
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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