JWH 210-d9 is intended for use as an internal standard for the quantification of JWH 210 by GC- or LC-mass spectrometry (MS). JWH 210 is a potent cannabimimetic alkylindole, binding the central cannabinoid and peripheral cannabinoid receptors with Ki values of 0.46 and 0.69 nM, respectively. The effects of JWH 210 in whole cells or organisms have not been evaluated.