Suppressor 3519 is an effective antifoam designed to eliminate foam that develops in many processes. The product is very well adapted to work in fermentation media that contain varying levels of solids. The main reasons for using Suppressor 3519 in fermentation media are that it has extremely low toxicity to microbial organisms, silicone free, and will not affect oxygen transfer pathways. The product also is not affected by sterilization and works over a broad temperature range.