''N''-Cyclohexyl-2-aminoethanesulfonic acid, also known as CHES, is a
buffering agent
A buffer solution (more precisely, pH buffer or hydrogen ion buffer) is an aqueous solution consisting of a mixture of a weak acid and its conjugate base, or vice versa. Its pH changes very little when a small amount of strong acid or base is a ...
.
Typically appears as a white crystalline powder.
CHES buffers have a useful range of pH 8.6–10.
External links
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Buffer solutions
Sulfonic acids