Zinc oxide

Zinc Oxide (ZnO) is an inorganic mineral widely used in:

• Sunscreens
• Diaper rash creams
• Calming/soothing skincare
• Barrier repair formulations
• Anti-acne preparations
• Ointments

It is available in two main forms:

Regular (non-nano) – larger particles → strong whitening effect, great barrier and soothing functions

Nano Zinc Oxide – small particles → transparent on skin, used mainly for sunscreens

🔹 Key Benefits

1. UV Protection (Broad-Spectrum)

Zinc oxide is one of the only UV filters that protects against:

• UVB (280–315 nm)
• UVA2 (315–340 nm)
• UVA1 (340–400 nm)

It is extremely photostable.

2. Skin Barrier Protection

Forms a physical barrier on skin to protect from:

• Irritation
• Moisture loss
• Harsh environmental factors

3. Anti-Inflammatory & Healing

Zinc has soothing, anti-irritant properties → excellent for:

• Diaper rash
• Minor wounds
• Dermatitis
• Acne inflammation

4. Antimicrobial Effects

Helps reduce bacteria and supports acne-prone skin.

🔹 Cosmetic Uses

Zinc oxide is commonly added to:

• Mineral sunscreens
• Baby diaper creams (10–20%)
• Calming creams (1–5%)
• Powder makeup (2–10%)
• Acne formulations (1–2%)
• Body powders

🔹 Formulation Considerations

✔ Use Levels
Sunscreens: 5–25%
Soothing/Healing Creams: 1–10%
Barrier Creams: 5–20%
Makeup: 2–10%

✔ Solubility
Insoluble in both water and oil
Must be dispersed evenly to avoid clumping.

✔ pH Sensitivity
Best at pH 7–10
At pH below 6, ZnO can dissolve and destabilize your formula.

✔ Dispersion Tips
Pre-wet with glycerin, propanediol, or light oil
Add slowly under high shear to avoid lumps
Use dispersing agents if available

✔ Avoid Acids
Zinc oxide reacts with:
AHAs (lactic, glycolic)
Citric acid
Ascorbic acid
Fermented ingredients with low pH
This can create zinc salts and destabilize your formula.

Best for
Diaper cream,
Soothing creams,
Makeup
Sunscreens

🔹 Safety

Zinc oxide is:

• Considered safe and non-irritating
• Approved for use worldwide
• Non-penetrating (stays on the skin surface)
• Recommended for sensitive skin and babies

Price: 100g 300
50g 160