Malachite Extract

Malachite extract (typically used at low fractions of a percent) is primarily an antioxidant/anti-pollution claim ingredient; available safety data and consumer patch-test reporting suggest it is generally well tolerated with low rates of irritation. However, as a mineral-derived extract often carried in a solvent system and potentially containing trace metals, it can trigger reactivity in a subset of highly sensitive or eczematous patients, so it cannot be scored as “very gentle” or “exceptionally gentle.” In routine use it behaves more like a low-risk adjunct than an active, so a gentle (0.3) rating best matches patient-safety expectations. Safety Notes: In commercial skincare, malachite extract is most often used as a trace-level antioxidant/anti-pollution marketing active, commonly appearing in leave-on serums, eye products, and moisturizers at very low levels (~0.0001–0.05%), often when supplied as a diluted extract or in a carrier. Higher-strength consumer-available formulas (typically leave-on masks, antioxidant concentrates, or “booster” serums) can reach ~0.1–0.5% malachite extract on an as-supplied basis, with occasional products listing up to ~1% in the finished formula, which tends to be constrained by color/clarity impact, mineral content, and stability/compatibility considerations. Rinse-off products generally sit toward the lower end due to short contact time and cost/benefit tradeoffs.