How to choose
Buffers generally work best near a relevant pKa. Use the target marker to identify catalog ranges, then consider assay chemistry, temperature, ionic strength, metal compatibility, and biological effects.
Buffer selection
Buffer pH Range Explorer — Choose a Buffer by Target pH
Start with the full pH overview, then enter a target, search names and synonyms, or filter classical and Good's buffers.
Catalog browsing and filtering run locally in your browser.
Explore useful pH ranges
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| Buffer | Useful pH | Category | Target ranking | Action |
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Reading the chart
Every bar uses the same pH 0–14 axis. A teal-highlighted card contains the entered target pH. The text range and list structure provide a non-visual alternative to every bar.
Validation and limitations
Useful ranges are selection guidance, not guarantees. Verify pH at working temperature and review the preparation calculator’s catalog notes. Some buffers have more than one pKa or require table-based recipes.
Related calculators
Save buffer recipes and protocol timers.
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