dispersant

noun

1. Any substance that is used to prevent settling or clumping of particles suspended in a liquid.

   “Since the effectiveness of dispersants is time-critical, the sooner that concurrence can be obtained and the dispersant applied, the more effective such”

   “Effects due to the dispersant solvent and surfactants in the water column may be surmised only from laboratory studies”

   “Scientists warn that the dispersed oil, as well as the dispersants themselves, might cause long-term harm to marine life.”