Email : zhou@sinobiochemistry.com Phone : +86-13941198570
 |
| Quantity: | |
|---|---|
Phosphorous Acid 99%
Sinobio
28092019
99% Crystal Powder Phosphorous Acid (H₃PO₃) is a white crystalline solid with broad-spectrum fungicidal activity, targeting oomycetes (e.g., Phytophthora, Pythium) and fungal pathogens in agriculture. Synthesized through hydrolysis of phosphorus trichloride, it features high purity and excellent water solubility, making it easy to formulate into liquid sprays. Its systemic action (absorbed through leaves and roots, translocated via xylem and phloem) and dual mode of activity (direct pathogen inhibition + plant immunity stimulation) make it a sustainable solution for crop protection. Unlike traditional fungicides, it has a low risk of resistance development, with effective control maintained over multiple growing seasons.
Parameter | Value |
Purity | ≥99% |
Appearance | White crystalline powder |
Melting Point | 73.6°C |
Density | 1.651 g/cm³ |
Solubility | Highly soluble in water (144 g/100mL @ 20°C) |
pH (1% solution) | 1.5–2.0 |
Chloride Content | ≤0.01% |
Heavy Metals | ≤5 ppm |
Dual Mode of Action:
Direct Pathogen Control: Inhibits oxidative phosphorylation in fungal cells by disrupting ATP synthesis, causing rapid cell death within 24–48 hours of application.
Immune Boosting: Stimulates plants to produce phytoalexins (antimicrobial compounds) and defensive enzymes (chitinases, peroxidases) by upregulating salicylic acid pathways, providing long-term protection for 14–21 days.
Effective against both contact and systemic phases of pathogen development, reducing disease recurrence.
Environmental Benefits:
Low toxicity to humans (LD50 >2,000 mg/kg oral in rats) and beneficial insects (bees, ladybugs) with no adverse effects at recommended application rates.
Biodegradable (degrades to orthophosphates in soil within 30 days) and non-persistent, avoiding soil accumulation and groundwater contamination.
Low risk to aquatic organisms (LC50 >10 mg/L for fish), making it safe for use near water bodies.
Versatile Application:
Suitable for foliar spraying (0.5–2% solution), soil drenching (50–100 ppm), and seed treatment (1–2 g/kg seed) across various crop types.
Compatible with most pesticides and fertilizers (except copper-based products) and can be tank-mixed with surfactants to enhance coverage.
Effective across a wide pH range (4–8) and temperature conditions (10–35°C), ensuring performance in diverse climatic zones.
Crop Protection:
Controls downy mildew in grapes, reducing disease incidence from 70% to <5% with 2–3 applications during flowering.
Manages late blight in potatoes and tomatoes, increasing marketable yield by 20–30% compared to untreated crops.
Prevents root rot in citrus, avocado, and ornamentals by suppressing soil-borne Phytophthora spp.
Enhances fruit quality (sugar content, firmness) and yield by reducing post-harvest decay, extending shelf life by 1–2 weeks.
Organic Farming: Approved for use in certified organic systems by USDA NOP and EU 834/2007 as a reduced-risk pesticide with no maximum residue limits (MRLs).
Greenhouses: Prevents powdery mildew in roses, cucumbers, and begonias, maintaining plant aesthetics and reducing crop losses.
Nurseries: Controls botrytis in bedding plants and potted flowers, ensuring healthy transplants for landscape and garden centers.
Turfgrass: Controls pythium blight in golf courses and sports fields, maintaining green coverage and playability during humid conditions.
Wood Preservation: Inhibits fungal growth (e.g., brown rot, white rot) in timber and plywood, extending service life by 2–3x in outdoor applications.
Paper Industry: Reduces mold formation in paper products stored in humid environments (e.g., corrugated boxes, paper rolls), preventing quality degradation and odor development.
| Chemical Name | Phosphorous Acid | CAS No. | 13598-36-2 |
| MF | H3O3P | MW: | 82 |
| EINECS | 237-066-7 | Structural Formula |  |
| Melting point | 73 °C | Boiling Point | 200 °C |
| Density | 1.651 g/mL at 25 °C(lit.) | Appearance | Crystal powder |
| Color | White | Water solubility | Soluble |
| Testing Item | Index | Result |
| Purity(h3po3) | 98.5% Min | 98.70% |
| Iron (Fe) | 0.005% Max | 0.0045% |
| Chloride (Cl) | 0.005% Max | 0.002% |
| Phosphate (Po4) | 0.2% Max | 0.18% |
| Sulphate(So4) | 0.008% Max | 0.006% Max |
99% Crystal Powder Phosphorous Acid (H₃PO₃) is a white crystalline solid with broad-spectrum fungicidal activity, targeting oomycetes (e.g., Phytophthora, Pythium) and fungal pathogens in agriculture. Synthesized through hydrolysis of phosphorus trichloride, it features high purity and excellent water solubility, making it easy to formulate into liquid sprays. Its systemic action (absorbed through leaves and roots, translocated via xylem and phloem) and dual mode of activity (direct pathogen inhibition + plant immunity stimulation) make it a sustainable solution for crop protection. Unlike traditional fungicides, it has a low risk of resistance development, with effective control maintained over multiple growing seasons.
Parameter | Value |
Purity | ≥99% |
Appearance | White crystalline powder |
Melting Point | 73.6°C |
Density | 1.651 g/cm³ |
Solubility | Highly soluble in water (144 g/100mL @ 20°C) |
pH (1% solution) | 1.5–2.0 |
Chloride Content | ≤0.01% |
Heavy Metals | ≤5 ppm |
Dual Mode of Action:
Direct Pathogen Control: Inhibits oxidative phosphorylation in fungal cells by disrupting ATP synthesis, causing rapid cell death within 24–48 hours of application.
Immune Boosting: Stimulates plants to produce phytoalexins (antimicrobial compounds) and defensive enzymes (chitinases, peroxidases) by upregulating salicylic acid pathways, providing long-term protection for 14–21 days.
Effective against both contact and systemic phases of pathogen development, reducing disease recurrence.
Environmental Benefits:
Low toxicity to humans (LD50 >2,000 mg/kg oral in rats) and beneficial insects (bees, ladybugs) with no adverse effects at recommended application rates.
Biodegradable (degrades to orthophosphates in soil within 30 days) and non-persistent, avoiding soil accumulation and groundwater contamination.
Low risk to aquatic organisms (LC50 >10 mg/L for fish), making it safe for use near water bodies.
Versatile Application:
Suitable for foliar spraying (0.5–2% solution), soil drenching (50–100 ppm), and seed treatment (1–2 g/kg seed) across various crop types.
Compatible with most pesticides and fertilizers (except copper-based products) and can be tank-mixed with surfactants to enhance coverage.
Effective across a wide pH range (4–8) and temperature conditions (10–35°C), ensuring performance in diverse climatic zones.
Crop Protection:
Controls downy mildew in grapes, reducing disease incidence from 70% to <5% with 2–3 applications during flowering.
Manages late blight in potatoes and tomatoes, increasing marketable yield by 20–30% compared to untreated crops.
Prevents root rot in citrus, avocado, and ornamentals by suppressing soil-borne Phytophthora spp.
Enhances fruit quality (sugar content, firmness) and yield by reducing post-harvest decay, extending shelf life by 1–2 weeks.
Organic Farming: Approved for use in certified organic systems by USDA NOP and EU 834/2007 as a reduced-risk pesticide with no maximum residue limits (MRLs).
Greenhouses: Prevents powdery mildew in roses, cucumbers, and begonias, maintaining plant aesthetics and reducing crop losses.
Nurseries: Controls botrytis in bedding plants and potted flowers, ensuring healthy transplants for landscape and garden centers.
Turfgrass: Controls pythium blight in golf courses and sports fields, maintaining green coverage and playability during humid conditions.
Wood Preservation: Inhibits fungal growth (e.g., brown rot, white rot) in timber and plywood, extending service life by 2–3x in outdoor applications.
Paper Industry: Reduces mold formation in paper products stored in humid environments (e.g., corrugated boxes, paper rolls), preventing quality degradation and odor development.
| Chemical Name | Phosphorous Acid | CAS No. | 13598-36-2 |
| MF | H3O3P | MW: | 82 |
| EINECS | 237-066-7 | Structural Formula | |
| Melting point | 73 °C | Boiling Point | 200 °C |
| Density | 1.651 g/mL at 25 °C(lit.) | Appearance | Crystal powder |
| Color | White | Water solubility | Soluble |
| Testing Item | Index | Result |
| Purity(h3po3) | 98.5% Min | 98.70% |
| Iron (Fe) | 0.005% Max | 0.0045% |
| Chloride (Cl) | 0.005% Max | 0.002% |
| Phosphate (Po4) | 0.2% Max | 0.18% |
| Sulphate(So4) | 0.008% Max | 0.006% Max |
