天莱施S（BEMT）双乙基己氧苯酚甲氧苯基三嗪

CAS：187393-00-6

质量标准：In House

天莱施S（双-乙基己氧苯酚甲氧苯基三嗪，俗称BEMT或Tinosorb® S）是一种高效广谱油溶性紫外线吸收剂，由瑞士汽巴精化（Ciba Specialty Chemicals，现属巴斯夫BASF） 原研。其主要功能是同时防护UVA（长波紫外线）和UVB（中波紫外线），吸收峰值分别位于310 nm和340 nm附近，适用于防晒化妆品。

其作用机制是基于其分子结构（三嗪类衍生物）有效吸收紫外线光子能量，并通过光热转化将其消散，从而减少紫外线对皮肤的伤害。天莱施S具有极高的光稳定性（即使在强紫外线照射下仍能保持98%以上的有效成分），不易分解，并能稳定其他光不稳定的防晒剂（如阿伏苯宗），减少其光降解。其优势还包括高效防晒（低添加量即可贡献高SPF和UVA-PF值）、感官特性佳（质地轻盈、肤感好）、以及安全性高。

Tinosorb® S (Bis-Ethylhexyloxyphenol Methoxyphenyl Triazine, BEMT) is a high-efficacy, broad-spectrum, oil-soluble UV filter originally developed by Ciba Specialty Chemicals (now part of BASF) in Switzerland. It protects against both UVA (320-400 nm) and UVB (280-320 nm) radiation, with absorption peaks around 310 nm and 340 nm, making it suitable for sunscreens and cosmetic formulations.

Its mechanism of action involves absorbing UV photon energy through its triazine-derived molecular structure and dissipating it as harmless heat, thereby preventing skin damage. Key advantages include exceptional photostability (maintaining over 98% efficacy even under intense UV exposure), the ability to stabilize other photolabile UV filters (e.g., avobenzone), and high efficacy (providing significant SPF and UVA-PF boost at low concentrations). It also offers a favorable sensory profile (light texture, nongreasy feel) and is considered safe for use