Avobenzone
Avobenzone is oil soluble, effective UVA absorber. Adequate solubility in the formulation must be ensured in order to avoid recrystallization during storage. To maximize utilization and high performance, Avobenzone should be properly photo-stabilized. Excellent material for stabilizations is OCT. Other additional options would be 3-(4-Methylbenzyliden) Camphor or BP-3; Use a chelating agent like EDTA.
CAS NO.: 70356-09-1
Chemical Formula: C20H22O3
Molecular Weight:310.39
EINECS NO.: 274-581-6
Assay: 99.0% min.
No | Test items | Especificación | |
1 | Apariencia | White to pale yellow powder | |
2 | Identity (IR) USP<197K> | Matches reference spectrum | |
3 |
Identity (Retention time) USP<621> | Matches reference
retention time |
|
4 |
UV specific extinction:
(E 1%,1 cm at 357 nm in ethanol) Spectrophotometry USP<197U> |
1100-1180 | |
5 | Melting point USP<741> | 81.0℃~86.0℃ | |
6 | Loss on drying(%) USP<731) | 0.5 max | |
7 |
Chromatographic
purity GC USP<621> |
Each impurity (%) | 3.0 max |
Total impurities(%) | 4.5 max | ||
8 | Assay(%)GC USP<621> | 95.0~105.0 | |
9 | Residual solvents GC USP<467> | Methanol (ppm) | 3000 max |
Toluene (ppm) | 890 max | ||
10 |
Microbial purity | Total amount of aerobe | 100 CFU/g max |
Total yeast and moulds | 100 CFU/g max |
Avobenzone Incompatibilities:
Deben evitarse los cationes metálicos multivalentes, ya que pueden formar decoloraciones (p. ej., Fe) o cristales debido a la menor solubilidad de los complejos (p. ej., Al y Mg). Los dióxidos de titanio recubiertos de aluminio pueden formar cristales. La combinación de AVB y óxido de zinc puede interactuar para formar un complejo que puede precipitar. AVB es incompatible con los donadores de formaldehído, que se utilizan principalmente como conservantes.
Avobenzone Regulatory status max concentration:
ASEAN 5%, China 5%, Europe 5%,Japan 10%, South Africa 5%,USA3%
Packaging: 20kg/Carton or 25kg/Carton
Shelf Life: 3 years