Urushiol Oil is Potent
1.Only 1 nanogram (billionth of a gram) needed to cause rash
2.Average is 100 nanograms for most people
3.1/4 ounce of urushiol is all that is needed to cause a rash in every person on earth
4.500 people could itch from the amount covering the head of a pin
5.Specimens of urushiol several centuries old have found to cause dermatitis in sensitive people.
6.*****1 to 5 years is normal for urushiol oil to stay active on any surface including dead plants *********
7.Derived from urushi, Japanese name for lacquer
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