○ Two phase system consisting of finely divided solids that are dispersed in a vehicle (Solid, liquid, or gas) ○ Also termed as mixtures, magmas, gels, and lotions ○ The substance (dispersed phase) is distributed to the vehicle (dispersing phase/medium) ○ The different types of suspensions only differ on the size of the dispersed phase (substance) and how fast they settle upon standing ○ Once mixed with water, their shelf-life would only last for 7 days (not refrigerated) and 14 days (refrigerated)