Centaris Seven

Centaris Seven, or Centaris VII, is a planet whose plants secrete a corrosive deadly to mechanical beings.

Fiction

The Dark Heart of Sandokan

Brushguard discovered the corrosive from Centaris Seven and weaponized it into a corrosive gas. He used this gas on the destructive entity Synthos. The Dark Heart of Sandokan

The AllSpark Almanac

Centaris VII was part of the Nebulon Republic. Transformers Animated: The AllSpark Almanac II