200nm Endotoxin Free Gold NanoparticlesComposition: Citrate stabilized gold colloid Core Size: 200nm Particles per ml: 1. 91E+9 Purity: >99% reactant free Endotoxin levels: <0. 5 EU mL Formulation: Supplied in 0. 1mM phosphate buffered saline (PBS) Intended use: Our extensively purified endotoxin free gold nanoparticles are ideal for sensitive applications requiring a minimal amount of contaminants, such as cellular toxicity studies, immunological studies, and aseptic assays. This product