Avobenzone powder, alias: butylmethoxydibenzoylmethane, is one of the few organic sunscreens that can absorb UVA1, which has the largest span of ultraviolet rays and is also the band area that most ultraviolet absorbers cannot protect against: 340-400 nanometer.
UVA protection is of great significance, perhaps more important than sun protection: UVA reaching the surface of the earth accounts for 95% of the total ultraviolet rays.
It was not until recently that scholars discovered that UVA is not only the main cause of skin photoaging, but also participates in cancer caused by sunlight. process. Compared with only 10% of UVB that can reach the uppermost dermis, 20%-30% of UVA can reach the dermis.
COA:
Assay | 95.0% Min | 99.28% |
Physical & Chemical | ||
Appearance | Off-white to yellowish crystal powder | Yellowish crystal powder |
Identification | A: infrared absorption 197k | Complies |
B: Ultraviolet absorption 197U Absorptivitires at 360nm do not differ by more than 3.0% | 0.009 | |
Melting range | 81.0~86.0 ℃ | 83.2~84.3 ℃ |
Loss on drying | 0.5% Max | 0.31% |
Impurities | Maximum of each individual impurity 3.0% Max | 1.12% |
Total impurities 4.5% Max | 0.31% |
Benefits of Avobenzone Powder:
Avobenzone is a sunscreen agent. It is a topical, broad-spectrum UV protectant that blocks UVA I, UVA II and UVB wavelengths, thereby limiting the impact of UV rays on the skin.
The special thing about avobenzone is that it can provide strong protection in the UVA1 range, and is matched with other UVB absorbers so that the entire formula can provide broad-spectrum UVA/UVB protection.
But it has a huge flaw - it is very optically unstable.
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