Description

Zinc oxide powder is a white, fine, inorganic compound (chemical formula ZnO) used widely in cosmetics, pharmaceuticals, industrial products, and more. Here’s a quick overview:

Key Properties

Appearance: Fine white powder

Solubility: Insoluble in water, soluble in acids and alkalis

Stability: UV-stable; provides strong UV absorption and scattering

Antimicrobial: Inhibits growth of bacteria and fungi

Common Uses
1. Skincare & Cosmetics

UV filter in sunscreens (physical/mineral sunscreen)

Ingredient in diaper creams, calamine lotion, anti-itch and rash treatments

Adds opacity/whiteness to creams and makeup

2. Pharmaceuticals

Protective barrier in ointments

Used for wound care due to mild astringent and antimicrobial properties

3. Industrial Applications

Rubber vulcanization activator

Ceramic glazes and glass

Paints and coatings (improves durability and mildew resistance)

Safety

Generally recognized as safe for topical use

Non-nano forms sit on the skin rather than being absorbed

Can cause dust irritation if inhaled in powder form

Nano-particle forms are regulated more specifically due to inhalation concerns

Zinc Oxide Powder — Detailed Safety & Handling Guide
1. Hazard Overview

Zinc oxide is considered low toxicity, but its powdered form poses risks due to inhalation and dust generation.

Primary Hazards

Inhalation: Fine particles can irritate the respiratory tract.

Eye irritation: Dust can cause discomfort, redness, or abrasion.

Skin contact: Usually safe; may cause dryness or irritation in sensitive individuals.

Ingestion: Not intended for consumption; may cause stomach upset.

Zinc oxide is non-combustible and non-reactive under normal conditions.

2. Personal Protective Equipment (PPE)
When handling loose powder:

Respiratory protection:

Use a dust mask (N95 or equivalent) when handling large or messy quantities.

Eye protection:

Safety glasses or goggles to prevent accidental dust entry.

Hand protection:

Nitrile or latex gloves if handling for extended periods or in formulations.

Clothing:

Lab coat or protective apron to avoid contamination of clothing.

3. Safe Handling Practices
Avoid Dust Generation

Handle in a well-ventilated area.

Use a weighing boat or tray to prevent spills.

Add powder to liquids slowly to minimize airborne particles.

If mixing into cosmetic bases, pre-wet the powder with a small amount of oil or glycerin to reduce dust.

Good Hygiene

Wash hands after handling.

Do not eat or drink in the handling area.

Avoid touching your face while working with powders.

4. Storage Guidelines

Store in a tightly sealed container to prevent dust escape and moisture uptake.

Keep in a cool, dry place away from strong acids (which can dissolve ZnO).

Label clearly with:

“Zinc Oxide Powder — Keep container closed. Avoid inhalation.”