⚠️ Research Use Only. Not validated for clinical diagnostic use.
Arrhenius Kinetics Calculator
Shelf-life prediction (t90) from temperature-dependent degradation rates using the Arrhenius equation.
Arrhenius Degradation Kinetics
k = A·exp(−Ea/RT). Shelf-life t90 = −ln(0.9)/k (time for 10% degradation).
Results
Degradation Rate k
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Shelf-Life t90
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Pre-exponential A
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Arrhenius Equation
| Symbol | Meaning |
|---|---|
| k | Degradation rate constant at target temperature (per day) |
| A | Pre-exponential factor (frequency factor) |
| Ea | Activation energy (J/mol) |
| t90 | Time for 10% degradation = −ln(0.9)/k |
Frequently Asked Questions
What is t90?
Time required for 10% degradation (90% potency remaining). First-order: t90 = −ln(0.9)/k.
What is activation energy?
Energy barrier for degradation (J/mol). Higher Ea = stronger temperature dependence of degradation rate.
Why does shelf-life drop with temperature?
Per Arrhenius, rate k increases exponentially with temperature. Higher temperature → faster degradation → shorter shelf-life.