Endotoxin Unit

**Semantic type:** Quantitative Concept

**Definition:** An arbitrary unit of endotoxin activity based on the activity of 0.2 ng of reference standard endotoxin, EC-2, and equivalent to 5 Endotoxin U/ng.

**Synonyms:** - EU - Endotoxin U - Endotoxin U - {Endotoxin U}