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style="background: #F8EABA; text-align: center;" colspan="2" | Identifiers
CAS number 94-82-6 YesY
PubChem 1489
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style="background: #F8EABA; text-align: center;" colspan="2" | Properties
Molecular formula C10H10Cl2O3
Molar mass 249.09 g/mol
Appearance Colorless to white crystal
Melting point

117-119 °C

Solubility in water 46 mg/L
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Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

2,4-DB or 4-(2,4-dichlorophenoxy)butyric acid is a selective systemic phenoxy herbicide used to control many annual and perennial broadleaf weeds in alfalfa, peanuts, soybeans, and other crops. Its active metabolite, 2,4-D, inhibits growth at the tips of stems and roots. It is classified in toxicity class III. It shows some evidence of toxicity to dogs and cats, such as changes in body weight and reduced numbers of offspring, when fed 25-80 milligrams per kilogram of body weight for prolonged periods. Tests of carcinogenicity in this range yielded differing results. It is moderately toxic to fish.[1]


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de:4-(2,4-Dichlorphenoxy)buttersäure nl:4-(2,4-dichloorfenoxy)butaanzuur
  1. 1.0 1.1 "Extension Toxicology Network: Pesticide Information Profiles".