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 ;
3D model (JSmol)	Interactive image;
Beilstein Reference	1976809
ChEBI	CHEBI:73173;
ChemSpider	1444 ;
ECHA InfoCard	100.002.152
KEGG	C14404 ;
PubChem CID	1489;
RTECS number	ES9100000;
UNII	SL314DW868 ;
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) Key: YIVXMZJTEQBPQO-UHFFFAOYSA-N ; 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
Precautionary statements	P264, P270, P273, P301+P312, P330, P391, P501
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)
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). verify (what is ?) 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

^ ^a ^b "Extension Toxicology Network: Pesticide Information Profiles". Archived from the original on 10 May 2008. Retrieved 15 June 2008.
^ ^a ^b ^c ^d "2,4-DB SDS". Sigma-Aldrich. Sigma Aldrich. Retrieved 14 May 2018.

[extoxnet-1] "Extension Toxicology Network: Pesticide Information Profiles". Archived from the original on 10 May 2008. Retrieved 15 June 2008.

[sigma-2] "2,4-DB SDS". Sigma-Aldrich. Sigma Aldrich. Retrieved 14 May 2018.

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[2]