Marketed as Ketanest®, Ketaset® and Ketalar®, ketamine is a widely used anesthetic, particularly in emergency and critical care medicine. The drug is also abused at clubs, raves, or parties for its noted hallucingenic and dissociative properties and prescribed by some doctors as an off-label treatment for depression. This certified solution standard is suitable for use as starting material in calibrators or controls for a variety of LC/MS or GC/MS testing applications from forensic analysis and clinical toxicology to urine drug testing.