ZINC OXIDE

INCI Name
Zinc Oxide (CI 77947)

Physical & Chemical Properties
Appearance: White, fine powder
Solubility ;Insoluble in water; dispersible in oils or emulsions
Use Rate: 2% – 25% (typical: 5–20% in sunscreens)
pH Stability: Best above pH 6.0; below pH 6, zinc ions may leach and destabilize formulations

UV Protection Broad-spectrum UVA & UVB blocker
Comedogenic Rating 1–2 (low risk of clogging pores)

Functional Benefits
Physical Sunscreen: Reflects and scatters UV rays; photostable and non-irritating

Anti-inflammatory: Calms redness, irritation, and inflammation, ideal for acne and sensitive skin

Antimicrobial: Helps reduce acne-causing bacteria and supports wound healing

Barrier Protection: Forms a breathable shield that prevents moisture loss (TEWL)

Oil Absorption: Mattifies skin and reduces excess sebum

Ideal Applications
Mineral sunscreens (face & body)

Diaper rash creams and balms

Acne spot treatments and masks

Post-procedure recovery creams

Mineral makeup (foundation, powders)

Deodorants and barrier creams

Formulation Tips
Use coated zinc oxide (e.g., triethoxycaprylylsilane-treated) for better dispersion and pH stability

Avoid low pH systems (<6) to prevent ion release and instability

Combine with emollients like shea butter or squalane for improved skin feel

Compatible with titanium dioxide, niacinamide, and panthenol

Safety & Compliance
Non-toxic and generally recognized as safe (GRAS)

Approved by FDA and EU for sunscreen use

Suitable for sensitive skin, pregnancy, and baby care