CAPSO sodium salt (CAS 102601-34-3)

CAPSO sodium salt is a specialized zwitterionic buffer used primarily in biochemical and molecular biology research to maintain the pH stability of solutions. Structurally, CAPSO (3-(Cyclohexylamino)-2-hydroxy-1-propanesulfonic acid sodium salt) is designed to operate efficiently within the pH range of 8.9 to 10.3, making it particularly valuable for experiments that require a stable alkaline environment. The buffering capacity of CAPSO arises from its zwitterionic nature, which means it contains both positive and negative charges that enable it to respond dynamically to changes in the hydrogen ion concentration. This dual charge characteristic allows CAPSO to stabilize pH by either accepting or donating protons, depending on the surrounding conditions. This makes it an excellent choice for maintaining the optimal activity of enzymes and other sensitive biological molecules during experiments that might be susceptible to fluctuations in pH. In research settings, CAPSO has been utilized in various applications, including protein solubilization and purification, where other common buffers might fail due to their limited effective pH range. Its ability to maintain a consistent pH in alkaline conditions without interfering with biological reactions or precipitating divalent cations makes it a preferred buffer in electrophoresis and other analytical techniques that are critical for studying complex biomolecular interactions.