Potassium Silicate (K₂SiO₃)
Silicon • lodging/disease tolerance • biostimulants
SiO₂ (liquid)
26–28% (w/w)
K₂O (liquid)
10–13% (w/w)
SiO₂ (powder)
50–52% (w/w)
pH
≈ 11.5–12.5
Density (liquid)
1.35–1.40 g/mL (20 °C)
Strongly alkaline. Avoid mixing with acids or Ca/Mg-rich products;
perform a jar test before tank mixing. Add to water first, then
other inputs.
| Parameter | Typical | Spec |
|---|---|---|
| SiO₂ (w/w) | 26–28% | ≥ 26% |
| K₂O (w/w) | 10–13% | ≥ 10% |
| SiO₂:K₂O molar ratio | ≈ 2.0 | 1.8–2.2 |
| Density (20 °C) | 1.35–1.40 g/mL | ≥ 1.30 g/mL |
| pH (20 °C) | 11.7–12.5 | ≥ 11.5 |
| Na₂O | ≤ 1.0% | ≤ 1.5% |
| Appearance | Clear to hazy viscous liquid | — |
| Parameter | Typical | Spec |
|---|---|---|
| SiO₂ (w/w) | 50–52% | ≥ 50% |
| K₂O (w/w) | 30–35% | ≥ 30% |
| Water insolubles | ≤ 0.5% | ≤ 1.0% |
| pH (1% soln) | 11.0–12.0 | ≥ 10.8 |
| Granulation | 0.2–1.0 mm | as ordered |
| Appearance | Off‑white, free‑flowing powder | — |
| Applications | Packaging | Storage & Handling |
|---|---|---|
|
• Foliar silicon to support cell wall strength, lodging
and abiotic stress tolerance.
• Fertigation/soil application in horticulture and broadacre. • Tank‑mix pH buffer/alkalinity builder; perform jar test. |
• Liquid: 20/200 L drums, 1000 L IBCs.
• Powder: 25 kg PE‑lined bags. • Private label/retail packs on request. |
• Alkaline. Wear eye/skin protection; avoid contact with
acids.
• Store sealed, above 5 °C; protect liquid from freezing. • Follow SDS for PPE, first aid and spill guidance. |
Specs are representative; shipped material conforms to the COA for
the lot. Local fertilizer/biostimulant registrations and labelling
rules apply—confirm per market.