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Chemicals: 2,4-D Disclaimer 2,4-D Name: 2,4-D Synonym(s): Dichlorophenoxyacetic acid 2,4-Dichlorophenoxyacetic acid Formula: Cl2C6H3OCH2COOH CAS Number: 94-75-7 Formula Weight: 221 Vapor Pressure: 0.4 mm Hg at 320°F Boiling Point: Decomposes Freezing Point: 280°F Solubility: 0.05% Ionization Potential: ? Specific Gravity: 1.57 Notes: White to yellow, crystalline, odorless powder. Noncombustible, though sometimes dissolved in flammable liquids. Herbicide. Excerpted from NIOSH Pocket Guide to Chemical Hazards, US GPO 1997 J551-571