防晒成份，化学性紫外线吸收剂，危险指数为 2/5(越高越不好)[1]。
Avobenzone的光稳定性(photostability)不高，经过紫外线的照射后会渐渐被分解而失去防晒效果，跟某些防晒成分(如ethylhexyl methoxycinnamate及无涂层物理防晒剂)放在一起，会更不稳定而更容易被光分解[2]。
[2]邱品齐医师，「认识Butyl Methoxydibenzoylmethane (Avobenzone) 」，SkinDoc Chiu\'s 化妆品严选菁华版，2008/05/18。
2011-07-11
请问乳液里添加这种成分是好是坏??
2011-09-30
卫生署规定浓度限量3%，此成分属含药化粧品需申请
个人使用含有这个成分的防晒都觉得很薰眼
擦在眼周时非常的不舒服
如果眼睛敏感的人 挑选防晒产品时
可以先试用看看再选购
网路上也有不少眼睛敏感的人表示这成分会薰眼
可以多注意
对阳光波长320nm~400nm的紫外线吸收力好，搭配物理性防晒达到更好的功效，是公认有效的化学性UVA吸收剂
2017-06-21
最大吸收值是357nm，光稳定性不佳，1小时光解率36%，需要和其他稳定性好的防晒剂同用，如奥克立林，天莱施等
"Avobenzone is an FDA-approved chemical to block UVA, the primary culprit of premature aging and skin cancer. But avobenzone breaks down very quickly in sunlight and releases harmful free radicals. So many brands add avobenzone stabilizers like octocrylene, homosalate, or octisalate. However, these chemicals may also trigger an allergic response and/or disrupt your hormone level."
https://ecocult.com/eco-friendly-effective-sunscreen/
https://pubchem.ncbi.nlm.nih.gov/compound/Avobenzone
2021-03-30
The famous Avobenzone. It is a special snowflake as it is the only globally available chemical sunscreen agent that provides proper UVA protection (in the US, new generation sunscreen agents are not approved because of impossible FDA regulations). It is the global gold standard of UVA protection and is the most used UVA sunscreen in the world.
It gives very good protection across the whole UVA range (310-400 nm that is both UVA1 and UVA2) with a peak protection at 360 nm. The problem with it, though, is that it is not photostable and degrades in the sunlight. Wikipedia says that avobenzone loses 36% of its UV-absorption capacity after just one hour of sunlight (yep, this is one of the reasons why sunscreens have to be reapplied after a few hours).
https://incidecoder.com/ingredients/butyl-methoxydibenzoylmethane
2021-04-14
Fast facts
Approved in: United States, Australia, Europe
Banned in: None; restricted use in Japan
Best for: Sun damage prevention
Coral safe? Detectable levels but no harm found
Found in chemical sunscreens
Avobenzone is commonly used to block the full range of UVA rays and is reported as ‘unstable’ in physical sunscreens.
On its own, the ingredient destabilizes when exposed to light. To combat this, it’s often paired with other ingredients (such as mexoryl) to stabilize avobenzone.
In many countries, avobenzone is used in combination with zinc oxide and titanium dioxide specifically, but in the United States, the combination isn’t permitted.
While it’s found in broad-spectrum sunscreens, it’s often combined with other chemicals because avobenzone by itself will lose 50 to 90 percentTrusted Source of its filtering abilities within an hour of light exposure.
In the U.S., the FDA deems this ingredient safe but restricts the concentration amount to 3 percent in sunscreen formulations.
https://www.healthline.com/health/beauty-skin-care/best-sunscreen-ingredients#avobenzone
Avobenzone(又称为Butyl Methoxydibenzoylmethane)-争议性大，遇光会不稳定
Avobenzone ＋ EthylHexyl Methoxycinnamate = 更不稳定更毒
目前学界分为两派说法
第一派：
根据文献研究，Avobenzone在碰到光的时候会容易产生分解，是不稳定的
而分解出来的物质，也会伤害我们的皮肤细胞
进到体内后，也会干扰我们的内分泌
另一派：
Avobenzone如果再搭配一些化学物质，就可以稳定它
例如「Octocrylene」、「Tinosorb」等等
就能使Avobenzone不会被光分解掉
能够安全的保护我们不受紫外线威胁
但是如果Avobenzone碰到「Octinoxate (Ethylhexyl methoxycinnamate)」，它会让Avobenzone变得更不稳定而且更毒，但Octinoxate (Ethylhexyl methoxycinnamate)虽然本身也有问题但却非常常见，除了防晒产品也常见于于香水、妆前乳、BB霜、CC霜、粉底、蜜粉中
消费者把产品层层叠叠涂在脸上，Avobenzone就很容易碰到Octinoxate (Ethylhexyl methoxycinnamate)
于是他们相遇了就变得更不稳定，就产生皮肤伤害
结论：含有Avobenzone的产品安不安全有可能是安全的，但Dr. Ivan 6本人不喜欢这个成分
PS.
Octinoxate
= Ethylhexyl methoxycinnamate
非常常见，约80%防晒产品都有
也常见于香水、妆前乳、BB霜、CC霜、粉底、蜜粉中
会刺激肌肤，在照射到太阳后产生发痒
更不适合有皮肤炎的人
另外它对珊瑚一样有害
参考资料：Dr. Ivan 6
https://www.youtube.com/watch?v=ebV6Ce3bTJw&list=PLjqh8dmRe2ys1JxtTGAsO1_1-9JaSXT1-&index=4