Laboratory calculator
PT-141 Half-Life Chart
Worked example
Worked example: with a half-life of 2.7 hours, PT-141 falls to 50% at 2.7 h, 25% at 5.4 h and 10% at 8.97 h; after 13.5 h (five half-lives) about 3.13% remains.
How it works
Remaining % = 100 x 0.5^(t / half-life). With a half-life of 2.7 h, 50% remains at 2.7 h, 25% at 5.4 h and 10% at 8.97 h. The time to reach a remaining fraction is half-life x log2(100 / remaining %).
Frequently asked questions
How long until half of PT-141 remains?
By definition after one half-life, which is 2.7 hours for the value stored on this page.
How is the 2.7 hour curve calculated?
First-order decay: remaining % = 100 x 0.5^(t / 2.7), with t in hours. At 5.4 h that gives 25% and at 8.97 h it gives 10%.
Where does the 2.7 hour half-life of PT-141 come from?
It is stored on the PT-141 compound record together with its source link. Enter a different half-life in the calculator to compare other published values.
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