Spinosad (Standard) is the standard substance of Spinosad, and it is applicable for quantitative analysis, quality control, and related research in biochemical experiments. Spinosad is a naturally-occurring insecticide found in the the soil bacterium S. spinosa. It is a mixture of the macrocyclic lactones spinosyn A and spinosyn D, which act as agonists of insect nicotinic acetylcholinesterase receptors (nAChRs).