Zinc oxide powder is a fine white mineral powder (chemical formula ZnO) used in cosmetics to soothe, protect and add coverage to formulations like sunscreens, balms, diaper creams and mineral makeup. It sits on the skin as a physical barrier against everyday environmental stress, which is why it appears in so many skincare and DIY beauty recipes. Azlok's zinc oxide is a 99% purity, technical-grade powder made in India, and it is meant strictly for external use.
What is zinc oxide powder?
Zinc oxide is produced from metallic zinc. In simple terms, the zinc is melted in a graphite crucible, vaporised at around 1000°C, and the vapours combine with oxygen in the air to form the fine white ZnO powder. Its INCI name is Zinc Oxide and its CAS number is 1314-13-2. The powder is odour-neutral to characteristic, has a pH between 7 and 11, and a molecular weight of about 81.38 g/mol.
Because it is skin-friendly and multi-purpose, formulators reach for it again and again. It is not a fragrance or a colour additive in the usual sense; it is a functional ingredient that changes how a product feels, covers and protects.
Common uses in cosmetics and skincare
- Mineral sunscreens: Zinc oxide is a physical sunblock that reflects and scatters light, so it is the backbone of many mineral SPF creams and lip balms.
- Diaper rash and barrier creams: Its soothing, protective nature makes it a classic in nappy creams and skin-barrier ointments.
- Healing balms and ointments: Added to salves for its calming feel on irritated skin.
- Acne and blemish products: Used in spot treatments and clay masks where a matte, absorbent finish is wanted.
- Body and face lotions: Contributes to coverage, texture and a smoother slip.
- Deodorants: Helps with a fresh, dry feel.
- Mineral makeup: Gives foundation and pressed powders their coverage and soft focus.
How to use it in your formulations
Zinc oxide is a powder, so the goal is always even dispersion without clumps. A few practical pointers:
- Weigh, do not eyeball. Use a digital scale and follow your recipe's percentage. In leave-on products, formulators commonly work within single to double-digit percentages depending on the product type.
- Disperse in the oil phase. For balms and anhydrous (oil-only) products, mix the zinc oxide into your carrier or melted butters and stir thoroughly until no grit remains.
- Avoid inhaling loose powder. Work slowly, wear a mask, and add the powder gently so it does not become airborne.
- Blend well for uniform coverage. A mini-blender or a good hand-whisk helps break up any lumps, especially in lotions and creams.
- Test small batches first. Make a small trial batch, check the feel and appearance, then scale up.
Safety notes worth reading
Zinc oxide is generally considered gentle on skin, but a few honest cautions apply:
- External use only. Do not ingest it and do not use it internally.
- Avoid on broken or ailing skin. If you have an active skin condition, skip it and consult a professional.
- Patch test finished products. Apply a small amount on your inner arm and wait 24 hours before wider use.
- Mind the dust. Wear a mask and work in a ventilated space to avoid breathing in fine particles.
- Keep away from children and pets.
This is a technical-grade material. Always check the MSDS and COA for your intended application, particularly if you are making products to sell.
Buying and storing zinc oxide powder
Azlok stocks zinc oxide powder starting at ₹389, with pack sizes of 500 g, 1 kg, 5 kg, 10 kg and 20 kg, so hobbyists and small businesses can both find a suitable quantity. It has a shelf life of about 24 months.
To keep it in good condition:
- Store in a cool, dry place away from direct sunlight and moisture.
- Keep the container tightly sealed; the fine powder readily picks up humidity and can clump.
- Use a clean, dry scoop each time to avoid contamination.
- Label your container with the purchase and opening dates.
FAQ
Is zinc oxide powder safe for the skin?
For most people it is a well-tolerated, external-use ingredient used widely in sunscreens and barrier creams. Always patch test your finished product and avoid using it on broken or unwell skin.
Can I make my own sunscreen with it?
Zinc oxide is the active mineral in many DIY sunscreens, but homemade SPF is hard to test for reliable protection. If you formulate one, treat it as an added barrier rather than a guaranteed SPF value.
Is this powder food grade or edible?
No. Azlok's zinc oxide is technical grade for external cosmetic use only. Do not ingest it or use it internally.
How do I stop it clumping in my cream?
Disperse it well in the oil phase and blend thoroughly. Store the powder sealed and dry, since moisture is the main cause of clumping.
What is the difference in the pack sizes?
They are the same 99% purity powder in different quantities, from a 500 g pack for home use up to 20 kg for larger production runs.