2,4-dichlorophenoxyacetic acid sodium
Agrochemicals 2025-03-02
2,4-Dichlorophenoxyacetic Acid Sodium Salt (CAS No. 2702-72-9)
1. Basic Information
- Chemical Name: Sodium 2,4-dichlorophenoxyacetate
- Synonyms: 2,4-D sodium salt; Sodium 2,4-D
- CAS Number: 2702-72-9
- Molecular Formula: C₈H₅Cl₂NaO₃
- Molecular Weight: 243.02 g/mol
- Appearance: White to tan crystalline powder
- Odor: Odorless
2. Physical and Chemical Properties
| Property | Value/Description |
|---|---|
| Melting Point | 215–218°C (dec.) |
| Solubility | – Water: ~600 g/L (20°C) |
| – Organic solvents: Low solubility | |
| pH (1% solution) | 7.0–9.0 |
| Density | 1.48 g/cm³ |
| Vapor Pressure | Negligible |
3. Hazards (GHS Classification)
- Acute Toxicity: Harmful if swallowed (H302)
- Eye Irritation: Causes serious eye irritation (H319)
- Environmental Hazards:
- Very toxic to aquatic life (H400)
- Persistent in soil (H412)
- NFPA Rating: Health 2, Flammability 1, Reactivity 0
4. Storage and Handling
- Storage:
- Tightly sealed in corrosion-resistant containers
- Store in cool, dry place away from acids
- Handling:
- Use nitrile gloves and safety goggles
- Avoid dust generation
5. Applications
- Herbicide: Selective weed control in agriculture
- Plant Growth Regulator: Stimulates fruit development
- Research: Auxin analog in plant physiology studies
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