★What is the appearance and purity of your Ascorbyl Glucoside?
It appears as white or off-white crystalline powder with purity ≥ 99% (HPLC test), low impurity, no odor and stable batch consistency.
★Is Ascorbyl Glucoside water-soluble or oil-soluble?
Ascorbyl Glucoside is excellent water-soluble, easy to dissolve in water phase and highly compatible with aqueous serums, toners and emulsified formulas.
★Is Ascorbyl Glucoside stable in cosmetic formulations? Does it discolor?
Ascorbyl Glucoside is exceptionally stable. It does not oxidize or discolor under normal cosmetic processing and storage conditions. It remains stable across a wide pH range (4.0–7.0, optimal 5.0–6.5) and tolerates temperatures up to 80°C. Unlike L-ascorbic acid, it does not require chelators or antioxidants for stability. In accelerated stability tests (40°C/75% RH for 3 months), AA-2G solutions remain clear and colorless with >98% purity retention.
★What is the recommended dosage of Ascorbyl Glucoside in cosmetic formulations?
Effective concentrations range from 1-5% depending on the target benefit:
Antioxidant protection / daily maintenance: 1-2%
Skin rightening / hyperpigmentation: 2-5% (most studies use 2-3%)
Anti-aging / collagen boost: 2-4%
Sunscreen / after-sun products: 1-3%
Rinse-off products (cleansers, masks): 2-5% (short contact time)
For first trials, start at 2%. Higher concentrations (up to 5%) are safe and well-tolerated but may increase formula cost.
★Can Ascorbyl Glucoside be combined with other active ingredients (niacinamide, retinol, AHAs, peptides)?
Yes, Ascorbyl Glucoside is highly compatible with most cosmetic actives:
With niacinamide: Excellent synergy for brightening and anti-aging (both water-soluble, stable at pH 5-6).
With retinol: Yes, but retinol is best used at pH 5.5-6.5, which matches AA-2G.
With AHAs/BHAs: Yes, but keep final pH above 4.0 to ensure AA-2G stability (AA-2G is stable down to pH 4.0).
With peptides: Fully compatible.
With hyaluronic acid, ceramides, botanical extracts: No issues.
Avoid combining with strong oxidizing agents (e.g., high-concentration benzoyl peroxide) in the same formula.
★Is Ascorbyl Glucoside approved for cosmetic use in the EU, USA, and China?
EU: Listed in CosIng as Ascorbyl Glucoside (CAS 129499-78-1) with no concentration restriction (typical use ≤5%).
USA: Allowed as a cosmetic ingredient; FDA has no specific ban.
China (NMPA): Listed in IECIC 2021 (INCI: 抗坏血酸葡糖苷) with no maximum concentration specified (typical use ≤5%).
We provide full registration documents including COA, MSDS, TDS, and China compliance declaration.
★What pH range is suitable for AA2G?
It remains stable and effective in pH 5.0–8.0 (weakly acidic to weakly alkaline), with wider compatibility than ordinary vitamin C.
★What ingredients can AA2G be compounded with?
It can be combined with niacinamide, alpha-arbutin, tranexamic acid, glabridin, hyaluronic acid and centella asiatica to achieve multi-path skincare efficacy.
★Is AA2G more stable than pure vitamin C?
Yes. AA2G has extremely high stability, not easy to oxidize, yellow or decompose, far more stable than L-ascorbic acid in formulas.