40 zinc oxide is a widely used industrial-grade zinc oxide powder with approximately 40% zinc purity, commonly applied in rubber, ceramics, glass, paint, and chemical manufacturing. Known for its optimal balance between performance and cost, this ZnO grade is a practical choice for manufacturers seeking quality without overpaying for ultra-high purity.
What Is 40 Zinc Oxide?
“40 zinc oxide” refers to a zinc oxide product with around 40% available zinc content, often derived through indirect or direct processes， depending on the manufacturer. It typically appears as a fine white powder and features:
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Moderate purity (∼40% Zn content)
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Good reactivity
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Stable physical properties
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Cost-effective compared to higher grades (like 99% ZnO)
This grade is commonly used where extremely high-purity zinc oxide is not necessary, such as in non-critical rubber parts, paints, fertilizers, and basic ceramics.
Key Properties of 40 Zinc Oxide
| Property | Specification |
|---|---|
| Zinc Content | ~40% |
| Appearance | Fine white or off-white powder |
| Particle Size | Varies (typically <5 microns) |
| Solubility | Insoluble in water, soluble in acids |
| pH Level | 6–8 (in suspension) |
| Production Method | Usually direct process (metallic zinc + air) |
Applications of 40% Zinc Oxide
1. Rubber and Tires
Used as an activator in vulcanization, improving elasticity, tensile strength, and heat resistance in rubber compounds.
2. Paints and Coatings
Acts as a pigment and mildew inhibitor, enhancing UV resistance and durability.
3. Ceramics and Glass
Promotes brightness and thermal shock resistance in glazes and frits.
4. Animal Feed & Fertilizers
Supplies essential zinc nutrients in agricultural and animal health products.
5. Chemical Intermediates
Used as a base in the synthesis of zinc salts like zinc sulfate and zinc chloride.
🔗 Recommended Resource: ICDA Zinc Oxide Applications Overview
40 Zinc Oxide vs 99% Zinc Oxide: What’s the Difference?
| Feature | 40 Zinc Oxide | 99% Zinc Oxide |
|---|---|---|
| Purity Level | ~40% Zn | ≥99% Zn |
| Cost | Low | High |
| Application | General industrial | Electronics, pharma |
| Environmental Use | Common in fertilizers | Limited |
| Reactivity | Moderate | High |
Conclusion: If your process doesn’t require ultra-high Zn purity, 40 zinc oxide delivers strong performance at a better price point.
Advantages of Using 40% Zinc Oxide
✅ Cost-Effective: Ideal for bulk usage without compromising functionality
✅ Versatile: Used across multiple industries
✅ Customizable: Available in different mesh sizes and packaging
✅ Stable Supply: Easier to source from global producers, especially in Asia and Africa
FAQ: 40 Zinc Oxide
1. What does “40 zinc oxide” mean?
It refers to a zinc oxide compound containing approximately 40% zinc, used in non-critical industrial processes.
2. Is 40% zinc oxide safe for use in agriculture?
Yes, it is widely used in animal feed and crop nutrition, as long as it’s certified for agricultural use.
3. What industries commonly use 40 ZnO?
Rubber, ceramics, paint, agriculture, and general chemical manufacturing.
4. How is 40% zinc oxide produced?
Usually via the direct process, where zinc ores or secondary materials are oxidized at high temperature.
5. Where can I buy 40 zinc oxide?
You can find it through industrial chemical suppliers or B2B platforms like Alibaba or Made-in-China.
Global Market Insight
According to the Zinc Oxide Industry Report 2024 (ResearchAndMarkets), the demand for mid-grade zinc oxide like the 40% variant is rising in developing regions due to its affordability and wide applicability.
Final Thoughts
40 zinc oxide is a strategic choice for manufacturers who need performance, versatility, and price control. Whether you’re enhancing rubber compounds, glazing ceramics, or enriching fertilizers, this industrial-grade ZnO meets the demands of cost-sensitive, high-volume production.
