Iscotrizinol (USAN,[1] INCI diethylhexyl butamido triazone) is an organic compound used in sunscreens to absorb UVB and some UVA radiation [2] with a peak protection at 310 nm.

[3] It is one of the most photostable chemical sunscreens known today with 25 hours required to lose 10% of its SPF protection ability.

[4] It is marketed as Uvasorb HEB by 3V Sigma.

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