To serve its intended purpose, each USP Reference Standard must be properly stored, handled, and used. Generally,
Reference Standards should be stored in their original stoppered
containers away from heat and protected from light. Avoid humid storage areas in particular. Where special storage conditions are necessary, directions are given on the label.
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Ph. Eur. 5.12. REFERENCE STANDARDS
5-3. STORAGE AND DISTRIBUTION
Reference standards are to be stored and distributed in conditions suitable to ensureoptimal stability. European Pharmacopoeia reference standards.
European Pharmacopoeia reference standards are mostly stored in temperature-controlled rooms at 5 ± 3 °C. However,
a number of reference standards that are relatively unstable are stored
at ?20 ± 5°C or, in a few cases (e.g. live virus preparations), at ? 80
± 10°C, and for cell cultures, under liquid nitrogen (?
180°C).Special packaging is employed to minimise the risk of damage
during transport.