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Provide batch numbers separated by commas to download or request available product inserts, QC sheets, certificates of analysis, data packs, and GC-MS data.

Our free, searchable, GC-MS spectral database contains 70eV EI mass spectral data of 2,000+ of Cayman’s forensic drug standards.
DOWNLOAD THE DATABASETheophylline (Item No. 32993) is an analytical reference standard categorized as a caffeine metabolite.1 Theophylline has been found as an adulterant in seized heroin samples.2 It has also been used as a marker of authentic human urine specimens.1 This product is intended for use in analytical forensic applications. This product is also available as a general research tool (Item No. 23760).
WARNING This product is not for human or veterinary use.
1. Catching fakes: New markers of urine sample validity and invalidity. J. Anal. Toxicol. 41(2), 121-126 (2016).
2. The re-