Ferric Defoamer is a fully organic, non-silicone, water-soluble defoamer that rinses readily and leaves no residue. It is designed for systems where clean rinsing is essential. It is odor-free and biodegradable. Ferric Defoamer is ideal for defoaming ferric chloride and ferric nitrate etchants. Ferric Defoamer is a powerful but application specific defoamer, which works well only at certain temperatures and in concentrated etchants.