[CAS Number 136765-35-0] Haloperidol-D4 is an internal standard used for the quantification of haloperidol. Haloperidol, also known by its brand name Haldol, is a phenylbutylpiperadine derivative and conventional antipsychotic. Haloperidol is approved to treat Tourette syndrome tics, mania in bipolar disorder, and hallucinations caused by alcohol withdrawal. Haloperidol-D4 is available as reference material (bulk powder and/or solution) and as calibrated, Ready-to-Use, certified reference material (CRM). This product is designed for qualitative and quantitative protocols and can be used for forensic, toxicology, research, and other chemical/biochemical analytical applications.