feststoffhaltige

Feststoffhaltige is a German attributive adjective formed from Feststoff (solid substance) and -haltig (containing). In technical language it describes materials, mixtures, or formulations that contain a solid phase. The term is used to distinguish systems with solids from purely liquid or gaseous systems and to indicate the presence and often the proportion of solids in a matrix.

In practice, feststoffhaltige describes a wide range of entities, such as feststoffhaltige Systeme (solid-containing systems), feststoffhaltige Zubereitungen (preparations containing solids), feststoffhaltige Dispersionen (dispersions of solids in liquids), or feststoffhaltige Suspensionen (solid particles dispersed in a liquid). The phrase is common in pharmacology, materials science, environmental technology, and industrial chemistry.

Measuring the solid content involves determining Feststoffgehalt or Feststoffanteil, usually by gravimetric methods where the solid mass is dried and weighed, or by other analytical techniques. The term helps to characterize processing properties such as viscosity, settling behavior, filtration, and stability of the formulation.

Related terms include Feststoff, Feststoffgehalt, and terms describing non-solid-containing systems such as lösungsmittelhaltig (solvent-containing). The concept is part of broader discussions on particulate matter, colloids, and phases in multiphase systems.