★What is the appearance and purity of your product?
It appears as white or almost white crystalline powder, with purity ≥ 99%, low impurity and stable batch consistency.
★Is 3-O-Ethyl-L-ascorbic Acid water-soluble or oil-soluble?
It is amphiphilic (both water-soluble and oil-soluble), which can be dissolved in water phase and oil phase, with excellent compatibility in various formulations.
★What products is it suitable for?
Whitening serum, essence water, cream, sunscreen, post-sun repair products, firming mask, eye cream and oil-control acne products.
★Is 3-O-Ethyl-L-ascorbic Acid stable in cosmetic formulations? What pH range is best?
Yes, it is exceptionally stable compared to pure vitamin C. It remains stable at pH 3.5–7.0 (optimal pH 5.0–6.5). It does not oxidize or discolor even after months at 40°C. It tolerates processing temperatures up to 70°C. No special chelators or antioxidants are required, though standard preservatives are recommended.
★Is 3-O-Ethyl-L-ascorbic Acid approved for cosmetic use in the EU, USA, and China?
EU: Listed in CosIng as 3-o-Ethyl Ascorbic Acid (INCI: 3-o-Ethyl Ascorbic Acid) with no concentration restriction (typical use 0.5-5%).
USA: Allowed; not restricted by FDA.
China (NMPA): Listed in IECIC 2021 (INCI: 抗坏血酸乙基醚) with no maximum concentration specified, but typical use ≤5%.
We provide full registration documents including COA, MSDS, TDS, and China compliance declaration.
★What is the recommended dosage of 3-O-Ethyl-L-ascorbic Acid in cosmetic formulations?
Whitening serums / ampoules: 2-5% (optimal 3%)
Anti-aging creams / lotions: 2-5%
Daily toners / moisturizers: 0.5-2%
Sunscreen / after-sun products: 1-3%
Masks (wash-off): 2-5%
At 1-2%, it provides antioxidant protection; at 3-5%, significant whitening and anti-aging effects. It is effective even at 0.5%.
★What is the difference between 3-O-Ethyl-L-ascorbic Acid and SAP/MAP?
SAP and MAP are water-soluble only; 3-O-Ethyl Ascorbic Acid is amphiphilic, easier to penetrate the stratum corneum, with faster effect.
