Propachlor
Agrochemicals 2025-03-02
Propachlor
Chemical Name: 2-Chloro-N-(1-methylethyl)-N-phenylacetamide
Synonyms: Albrass; CP 31393
CAS Number: 1918-16-7
Molecular Formula: C₁₁H₁₄ClNO
Molecular Weight: 211.69 g/mol
Physical & Chemical Properties
| Property | Specification |
|---|---|
| Appearance | White to tan crystalline solid |
| Odor | Slightly pungent |
| Melting Point | 67-76°C (153-169°F) |
| Boiling Point | 110°C (230°F) at 0.03 mmHg |
| Vapor Pressure | 1.2 × 10⁻⁴ mmHg (25°C) |
| Solubility | Water: 580 mg/L (20°C); soluble in acetone, ethanol |
| Partition Coefficient (log P<sub>ow</sub>) | 2.18 |
Hazard & Safety Information (GHS)
Warning Symbols:
⚠️ Acute Toxicity (Category 4)
⚠️ Environmental Hazard (Category 2)
Hazard Codes:
• H302: Harmful if swallowed
• H317: May cause allergic skin reaction
• H410: Very toxic to aquatic life with long-lasting effects
Precautionary Measures:
• P273: Avoid release to the environment
• P280: Wear protective gloves/clothing
• P301+P312: IF SWALLOWED: Call a poison center
Chemical Behavior
• Stability:
- Stable under normal conditions
- Hydrolyzes slowly in alkaline conditions
• Photolysis: Degrades under UV light
Applications
✔ Herbicide:
- Pre-emergence control of annual grasses/broadleaf weeds in corn, soybeans
✔ Mode of Action: - Inhibits cell division (microtubule assembly disruptor)
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