Zinc Oxide

Goodsunscreen_filter

A mineral UV filter that provides broad-spectrum protection against UVA and UVB rays.

What is Zinc Oxide?

CAS Number

1314-13-2

Formula

ZnO

Molecular Weight

81.38 g/mol

Also known as: CI 77947, Zinc White, Calamine (with iron oxide)

What does Zinc Oxide do for skin?

Inorganic UV filter that reflects and scatters UVA and UVB radiation via physical blocking. Broad-spectrum protection across 290-380 nm. Photostable (does not degrade under UV exposure). Astringent and antimicrobial properties via release of zinc ions. Anti-inflammatory action through inhibition of mast cell degranulation. Micronized and nano forms reduce white cast while maintaining efficacy.

Typical concentration: 2-25% (FDA maximum 25%)

Is Zinc Oxide safe?

FDA Category I sunscreen (GRASE). Does not penetrate beyond the stratum corneum even in nano form. Non-irritating. Safe for sensitive skin and children. Only 2 UV filters with confirmed GRASE status (along with titanium dioxide).

What does the research say about Zinc Oxide?

Regulatory Info

Status: Allowed Colorant
Restrictions: Warning: Not to be used in applications that may lead to exposure of the end-user's lungs by inhalation.

Can I mix Zinc Oxide with other ingredients?

Caution

Vitamin C

Zinc can interfere with vitamin C absorption when layered directly. Apply vitamin C first and let it absorb before zinc-based products.

Info

Niacinamide

Zinc + niacinamide is a classic for oily/acne-prone skin. They regulate sebum and reduce inflammation together.

Info

Niacinamide

Niacinamide and zinc together are great for oily and acne-prone skin. They reduce sebum and calm inflammation.

Read all ingredient interaction guides for layering order and science-backed advice.

All Ingredients

Frequently Asked Questions

What does Zinc Oxide do in skincare?+

A mineral UV filter that provides broad-spectrum protection against UVA and UVB rays. Inorganic UV filter that reflects and scatters UVA and UVB radiation via physical blocking. Broad-spectrum protection across 290-380 nm. Photostable (does not degrade under UV exposure). Astringent and antimicrobial properties via release of zinc ions. Anti-inflammatory action through inhibition of mast cell degranulation. Micronized and nano forms reduce white cast while maintaining efficacy.

Is Zinc Oxide safe for sensitive skin?+

FDA Category I sunscreen (GRASE). Does not penetrate beyond the stratum corneum even in nano form. Non-irritating. Safe for sensitive skin and children. Only 2 UV filters with confirmed GRASE status (along with titanium dioxide).

What percentage of Zinc Oxide should I look for?+

Look for products with 2-25% (FDA maximum 25%) for clinical efficacy.

Can I use Zinc Oxide with Vitamin C?+

Use Zinc Oxide with Vitamin C carefully. Zinc can interfere with vitamin C absorption when layered directly. Apply vitamin C first and let it absorb before zinc-based products.

Can I use Zinc Oxide with Niacinamide?+

Zinc Oxide can be used with Niacinamide. Zinc + niacinamide is a classic for oily/acne-prone skin. They regulate sebum and reduce inflammation together.

Can I use Zinc Oxide with Niacinamide?+

Zinc Oxide can be used with Niacinamide. Niacinamide and zinc together are great for oily and acne-prone skin. They reduce sebum and calm inflammation.

Further Reading