Description
TRIS is a crystalline buffer salt with a minimum purity of 99 % and the empirical formula C₄H₁₁NO₃. It has a molar mass of 121,14 g/mol, a density of 1,32 g/cm³ and a boiling point of 288 °C. Identified by CAS number 77-86-1 and EG number 201-064-4, this material is widely used to prepare buffer systems for biochemical, molecular biology and general laboratory workflows that require stable pH control. The crystalline form dissolves readily for stock and working buffer preparation according to established recipes. Available from manufacturer Carl ROTH, TRIS supports applications across performance materials and buffer salt categories where consistent quality and well-documented physicochemical data are important. Laboratories value its defined composition for electrophoresis buffers, extraction media and other aqueous systems that depend on reliable tris(hydroxymethyl)aminomethane chemistry without unnecessary formulation complexity.
This article is part of Biological buffers (Tris, HEPES, MOPS), in Buffers & pH solutions.
Key features
- Appearance: white to off white crist. powder
- Assay (dry substance): ≥99.0 %
- Water: ≤1.0 %
- pH value (5 % in H2O): 10.0-11.5
- CAS number: 77-86-1
- Pack sizes: 500 g, 1 kg, 5 kg, 10 kg, 25 kg
- EG nr.: 201-064-4
- Purity: min. 99 %, crystalline
- Empirical formula: C₄H₁₁NO₃
- Molar mass: 121,14 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
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Questions about TRIS, min. 99 %, cryst., 500 g, plastic
What is this article?
TRIS, min. 99 %, cryst., 500 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 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?
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. Delivery across Europe, two to five days when in stock. 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.
