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5-CL-ADBA, formally designated (S)-N-(adamantan-1-yl)-1-(5-chloropentyl)-1H-indazole-3-carboxamide, is a synthetic cannabinoid of the indazole-3-carboxamide class. It is among the most extensively characterised third-generation synthetic cannabinoids and is established as a standard reference compound in cannabinoid receptor research and forensic analytical chemistry. 5-CL-ADBA acts as a full agonist at cannabinoid receptor type 1 (CB1) and cannabinoid receptor type 2 (CB2). The indazole ring system replaces the indole scaffold used in earlier synthetic cannabinoids, and the adamantyl carboxamide group provides the high-affinity binding interaction with the orthosteric cannabinoid receptor binding site. The 5-chloropentyl chain at N1 has been identified in SAR studies as a critical structural determinant of CB1 binding affinity. 5-CL-ADBA's analytical fingerprint — including its mass spectrometric fragmentation pattern, NMR chemical shift assignments, and chromatographic behaviour — is thoroughly documented in forensic chemistry databases and peer-reviewed publications. Our 5-CL-ADBA is manufactured to 99%+ purity, confirmed by HPLC-MS, ¹H and ¹³C NMR, and elemental analysis. A full Certificate of Analysis with complete spectral data is provided with every order. Applications include cannabinoid receptor pharmacology, forensic toxicology reference standards, analytical method development, and SAR studies of the indazole-3-carboxamide series.