Liquichek™ Urine Toxicology Negative Control is confirmed drug-free human urine for 32 of the most commonly abused drugs.
- 3 year shelf life at 2–8°C
- 60 day open-vial stability when stored refrigerated at 2–8°C
- Use with screening or confirmatory methods
Refer to the package insert of currently available lots for specific analyte, stability claims, and detection limits of methods used.