n-Octyl-β-D-maltopyranoside is a water-soluble non-ionic detergent suitable for solubilization and isolation of membrane proteins. n-Octyl-β-D-maltopyranoside is closely related to n-octyl-β-D-glucopyranoside (CMC 20-25 mM) and n-dodecyl-β-D-maltopyranoside (CMC 100 - 600 M).