Description
Cacodylic acid sodium salt trihydrate is a biological buffer reagent offered as PUFFERAN® with a minimum assay of 98 %. It carries CAS number 6131-99-3 and the empirical formula C₂H₆AsNaO₂ · 3 H₂O, with a molar mass of 214,03 g/mol and a density of 0,8 g/cm³. provides a convenient working quantity for biochemistry and life-science buffer preparation. Sodium cacodylate trihydrate is widely applied where stable buffering around physiological pH ranges is required in sample preparation, fixation-related workflows and related laboratory protocols. Clear identity data, including EG number 204-708-2, support documentation in regulated and research environments. This grade is available from manufacturer Carl ROTH under the PUFFERAN® line for biological buffer reagents. Physical properties and the stated minimum purity help laboratories specify the salt consistently across batches. The plastic packaging suits dry storage and routine weighing on the bench. It is positioned for biochemistry groups that need a defined cacodylate buffer component without unnecessary bulk.
This article is part of Biological buffers (Tris, HEPES, MOPS), in Buffers & pH solutions.
Key features
- Appearance: fine, white crystals
- Assay (as trihydrate): ≥98.0 %
- pH-value: 8.0-8.3
- Aqueous solution (2 g +10 ml): clear, colourless
- Chloride (Cl): ≤0.02 %
- Arsenic (As): ≤0.05 %
- Methylarsonic acid disodium salt: complies BPC-49
- Acidity/alkalinity: complies BPC-49
- CAS number: 6131-99-3
- Pack sizes: 50 g, 250 g, 10 g
- EG nr.: 204-708-2
- Empirical formula: C₂H₆AsNaO₂ · 3 H₂O
- Molar mass: 214,03 g/mol
- Technical Information Sheet:
- Safety Data Sheet:
Compliance & Safety Information
DangerHazard Statements (H-Phrases)
Precautionary Statements (P-Phrases)
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Questions about Cacodylic acid sodium salt trihydrate, PUFFERAN® min. 98 %, 50 g, plastic
What is this article?
Cacodylic acid sodium salt trihydrate, PUFFERAN® min. 98 %, 50 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.
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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).
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