Several groups of carbonaceous chondrites, notably the CM and CI groups, contain high percentages (3% to 22%) of water, as well as organic compounds.
Mõnele süsinikkondriidirühmale – iseäranis CM- ja CI-rühmale, on iseloomulik suhteliselt suur vee (3–22%) ning ka orgaaniliste ühendite sisaldus.