Toxicity is a major reason why compounds fail in drug or product development. Being able to quickly and accurately identifying toxic compounds and prevent incorrect labeling as toxic is important to reduce late stage attrition. Current toxicity assays have various downsides; they are low in sensitivity and specificity and fail to provide mechanistic insight. The consequences are unnecessary investment in hazardous compounds, loss of high potential lead compounds and needless animal testing. We offer assays which helps to identify toxic compounds quickly and accurately, and prevents incorrect labelling as toxic.