Octamethylcyclotetrasiloxane vs. Siloxane

Octamethylcyclotetrasiloxanenoun

(chemistry) A particular cyclic siloxane.

Siloxanenoun

(chemistry) Any of a class of compound having a short repeating unit of silicon and oxygen atoms (either in a chain or a ring), typically with organic side chains

Octamethylcyclotetrasiloxane

Octamethylcyclotetrasiloxane, also called D4, is an organosilicon compound with the formula [(CH3)2SiO]4. It is a colorless viscous liquid.

Siloxanenoun

any of a large class of compounds that have alternate silicon and oxygen atoms

Siloxane

A siloxane is a functional group in organosilicon chemistry with the Si−O−Si linkage. The parent siloxanes include the oligomeric and polymeric hydrides with the formulae H(OSiH2)nOH and (OSiH2)n.