Diatomaceous Earth For Indoor Outdoor Use
Diatomaceous Earth for Indoor and Outdoor Use
Diatomaceous earth (DE) is a naturally occurring siliceous sediment formed from the fossilized shells of diatoms. Its microstructure consists of a network of microscopic pores ranging from 0.1 mm to 0.5 mm, providing a high specific surface area and strong liquid‑absorbent capacity. These physical attributes allow DE to serve as a filter medium, anti‑caking agent, and moisture regulator in both indoor and outdoor settings.
Composition and Properties
- Typical SiO₂ content: 88–92 % by weight.
- Bulk density (loose): 0.32–0.40 g cm⁻³.
- Particle size D50: 12–18 µm; D90: 45–65 µm.
- pH of a 10 % slurry: 7.8–8.2 (neutral to slightly alkaline).
- Loss on ignition at 1000 °C: ≤4 % (organic residue).
- Absorptive capacity for liquids: 1.3–1.5 g liquid per g DE.
- Moisture content (as‑packed): ≤0.5 %.
Typical Applications
In indoor environments, DE is commonly blended into potting mixes to improve aeration and water retention, used as a carrier for insecticidal powders, and employed as a spill‑absorbent material in laboratories and workshops. Outdoors, the same material functions as a soil amendment that enhances drainage in heavy clay soils, as an anti‑caking additive in granular fertilizers, and as a filtration medium in pool‑side sand filters. Its inert silica composition ensures it does not react with most chemicals, while its mild abrasivity provides mechanical pest control without harming beneficial organisms. Because DE retains its structural integrity under varying temperature and humidity conditions, it performs reliably across seasonal changes.
Technical Specifications
| Parameter | Typical Value | Test Method / Reference |
|---|---|---|
| SiO₂ Content (% wt) | 88–92 | ASTM D283 (XRF) |
| Bulk Density (loose) (g/cm³) | 0.32–0.40 | ASTM C29 |
| Particle Size D50 (µm) | 12–18 | ASTM D422 (laser diffraction) |
| Particle Size D90 (µm) | 45–65 | ASTM D422 |
| pH (10 % slurry) | 7.8–8.2 | ASTM D1293 |
| Loss on Ignition (1000 °C) (%) | ≤4 | ASTM D2584 |
| Absorptive Capacity (g liquid/g DE) | 1.3–1.5 | Internal gravimetric test |
| Moisture Content (as‑packed) (%) | ≤0.5 | ASTM D2216 |
Quality Assurance
Raw diatomaceous earth is sourced from regulated quarries with consistent geological profiles. After extraction, the material undergoes primary crushing, followed by controlled milling to achieve target particle size distributions. Each production lot is screened for moisture content, then tested for SiO₂ purity, pH, loss on ignition, and absorptive capacity using the methods listed above. Results are recorded in a batch traceability system, and any lot failing to meet the defined specifications is reprocessed or rejected. This systematic approach ensures that the product delivers uniform performance across indoor and outdoor applications.
Customization Options
- Particle size grading: custom D50 and D90 ranges available upon request.
- Surface treatment: hydrophobic silica coating for water‑repellent grades.
- Packaging: 25 kg multi‑wall bags, 500 kg bulk sacks, or 1200 kg super sacks with palletization.
- Moisture content adjustment: low‑moisture (<0.2 %) or conditioned grades for specific processing needs.
- Blending: optional combination with perlite, zeolite, or activated carbon for multifunctional products.
- Labeling and documentation: custom SDS, COO, and QR‑code labeling for supply‑chain traceability.
Frequently Asked Questions
- Can the particle size be customized to specific ranges? Yes, milling and classification can be adjusted to meet custom D50 and D90 specifications; please provide the target range during quotation.
- What information is needed to obtain a quotation? Required details include desired particle size, moisture content, any surface treatment, packaging type, order quantity, and delivery destination.
- Is the product available in food‑grade or pest‑control grades? Standard grades are industrial; food‑grade or pest‑control variants require additional processing and certification, which can be arranged upon request.
- How is the material packaged for bulk shipment? Bulk shipments use lined super sacks placed on pallets, secured with stretch wrap, and loaded into standard 20‑ft or 40‑ft containers.
- What lead time should be expected for standard orders? Standard lead time is 3–4 weeks after purchase order confirmation, subject to stock availability and production scheduling.
- Are samples available for evaluation? Yes, 1‑kg sample units can be shipped at no cost; freight charges apply for international destinations.
Get a Quote
To discuss your specific requirements or request a formal quotation, please contact our technical sales team via the inquiry form. Provide the application details, quantity, and any customization needs, and we will respond with a detailed proposal within one business day.