Storage Potency Half-Life Calculator
Estimate storage half-life from daily decay and project potency at custom day marks — live, with a decay curve.
Important: This tool calculates storage half-life (time for vial potency to reach 50% in storage), not pharmacological/biological half-life in the body.
Formula: t½ = log(0.5) / log(1 − r) — derived from the first-order discrete decay model P(t) = (1 − r)t, solving for t when P = 0.5. This is the standard pharmaceutical stability model perICH Q1A(R2)(Waterman & Adami, Int J Pharm 2005, PMID 15778049). Decay rates are [Model Estimates — PeptideClock].
Peptide: 5-Amino 1MQ
Fridge daily decay: 0.500%
Estimated half-life: 138.3 days
Projected potency at day 30: 86.0%
86% potency remaining
Fridge potency over time (marker = day 30)