2,4-DB

2,4-DB^[1][2]

Names
Preferred IUPAC name 4-(2,4-Dichlorophenoxy)butanoic acid
Other names (2,4-Dichlorophenoxy)butyric acid Butirex Butyrac Embutone Embutox Venceweed
Identifiers
CAS Number	94-82-6 Y
3D model (JSmol)	Interactive image
Beilstein Reference	1976809
ChEBI	CHEBI:73173
ChemSpider	1444 Y
ECHA InfoCard	100.002.152
KEGG	C14404 Y
PubChem CID	1489
RTECS number	ES9100000
UNII	SL314DW868 Y
UN number	3082
CompTox Dashboard (EPA)	DTXSID7024035
InChI InChI=1S/C10H10Cl2O3/c11-7-3-4-9(8(12)6-7)15-5-1-2-10(13)14/h3-4,6H,1-2,5H2,(H,13,14) Y Key: YIVXMZJTEQBPQO-UHFFFAOYSA-N Y InChI=1/C10H10Cl2O3/c11-7-3-4-9(8(12)6-7)15-5-1-2-10(13)14/h3-4,6H,1-2,5H2,(H,13,14) Key: YIVXMZJTEQBPQO-UHFFFAOYAK
SMILES Clc1cc(Cl)ccc1OCCCC(=O)O
Properties
Chemical formula	C10H10Cl2O3
Molar mass	249.09 g/mol
Appearance	Colorless to white crystal
Melting point	117 to 119 °C (243 to 246 °F; 390 to 392 K)
Solubility in water	46 mg/L
Hazards
Occupational safety and health (OHS/OSH):
Main hazards	Persistent hazard to marine life.
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H302, H411[2]
Precautionary statements	P264, P270, P273, P301+P312, P330, P391, P501[2]
NFPA 704 (fire diamond)	0 0 0
Lethal dose or concentration (LD, LC):
LC50 (median concentration)	1.97 mg/L - 96.0 h (Rainbow Trout)[2]
Safety data sheet (SDS)	Sigma-Aldrich Site
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Y verify (what is YN ?) 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 broad-leaf 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]

References