Overview
Etocrylene (CAS 5232-99-5 ), also known as UV Absorber-2, is an organic UV absorber that protects substrates from ultraviolet degradation. It functions by absorbing UV radiation in the UVB and UVA range.
This chemical prevents photodegradation in finished products and formulations. In personal care, it is incorporated into sunscreen formulations and cosmetic products where UV protection is required for the user.
It is often used in combination with other UV filters to broaden spectral coverage. Plastics and polymer manufacturers use it as a light stabilizer in films, coatings, and molded articles to prevent yellowing.
This stabilizer also prevents mechanical degradation caused by UV exposure. In printing and packaging, it is used in UV-curable inks and varnishes to improve photostability and extend the service life of surfaces.
It also appears in adhesives and industrial coatings where long-term resistance to UV-induced breakdown is a requirement. Etocrylene is supplied as a pale yellow to yellow liquid or low-melting solid.
The physical state depends on temperature and purity. It is available in cosmetic-grade and technical-grade specifications to meet the requirements of personal care and industrial applications respectively.
Standard packaging includes drums and intermediate bulk containers. Purity is typically confirmed by HPLC to ensure the material meets the necessary performance benchmarks for high-end manufacturing.
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Physical Properties
| Melting Point | 95-97 °C |
| Boiling Point | 185-195 °C @ Press: 1 Torr |
| Density | 1,05 g/cm 3 |
| Color | White to Almost white |
| Form | powder to crystal |
| Refractive Index | 1.5100 (estimate) |
| Log P | 4.520 (est) |
Safety & Handling
Warning GHS07 GHS09 Hazard Statements H315 Causes skin irritation H319 Causes serious eye irritation H335 May cause respiratory irritation H400 Very toxic to aquatic life H410 Very toxic to aquatic life with long lasting effects Precautionary Statements P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P264 Wash … thoroughly after handling. P271 Use only outdoors or in a well-ventilated area. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P391 Collect spillage. P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P332+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P362+P364 Take off contaminated clothing and wash it before reuse. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 29269090 |
| UN Number | 3077 |
| ADR Class | 9 |
| Packing Group | III |
| Storage Class | 11 - Combustible Solids |
| WGK (Germany) | 3 |
Other Names
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Chemical Properties
- CAS Number
- 5232-99-5
- EC Number
- 226-029-0
- Mol. Weight
- 277.3
- HS Code
- 29269090
- Category
- Flavors & Fragrances