1-(4-methoxyphenyl)-1-methyl-3-(1-methyl-5-benzotriazolyl)urea

The compound 1-(4-methoxyphenyl)-1-methyl-3-(1-methyl-5-benzotriazolyl)urea, also known as **UV-9** or **TINUVIN 9**, is an **organic ultraviolet (UV) absorber**. It is used in many applications to protect materials from degradation caused by UV radiation.

Here's why it's important for research:

* **UV Protection:** Its primary function is to **absorb UV light**, preventing it from reaching and damaging the material it's protecting. This is crucial for:
* **Plastics:** UV-9 is commonly used in polymers and plastics to prevent discoloration, cracking, and degradation caused by sunlight exposure.
* **Coatings:** It's often added to paints, varnishes, and coatings to enhance their durability and prevent fading.
* **Cosmetics:** It protects the skin from the harmful effects of UV radiation in sunscreens and other personal care products.
* **Research Applications:**
* **Materials Science:** Researchers investigate its effectiveness in various materials and develop new applications for its UV protection capabilities.
* **Photochemistry:** UV-9 is studied to understand its mechanism of UV absorption and how it interacts with different molecules.
* **Biology:** There's research exploring potential biological effects of UV-9, including its potential use in photodynamic therapy for cancer treatment.

**Overall, 1-(4-methoxyphenyl)-1-methyl-3-(1-methyl-5-benzotriazolyl)urea is a vital component in various industries and research areas due to its ability to protect materials from the damaging effects of UV radiation.**

**Note:** While UV-9 is generally considered safe in the quantities used in consumer products, there may be potential health risks associated with high concentrations or exposure. It's always best to consult with a professional for any specific concerns.