We report chromatographic isolation of a new thiolate-protected gold cluster species from the similar to 8 kDa Au-n(SR)(m) clusters. This new cluster is separated by size-exclusion chromatography from Au-38(SC2H4Ph)(24) (a previously reported main component in the -8 kDa gold-thiolate species). Based on detailed MALDI and ESI mass spectrometry analyses, the new cluster possesses a core mass of similar to 8.6 kDa and its formula is determined to be Au-40(SC2H4Ph)(24). The Au-40(SR)(24) species is also found to exist in other thiolate systems, including -SR=SC6H13 and SC5H11, indicating that Au-40(SR)(24) is a ubiquitous cluster as is AU(38)(SR)(24).