2,4-dichlorophenol

2,4-Dichlorophenol

Names
Preferred IUPAC name 2,4-Dichlorophenol
Identifiers
CAS Number	120-83-2 Y
3D model (Jmol)	Interactive image
ChEBI	CHEBI:16738 Y
ChemSpider	8140 Y
ECHA InfoCard	100.004.027
KEGG	C02625 Y
PubChem CID	8449
UNII	R669TG1950 Y
InChI InChI=1S/C6H4Cl2O/c7-4-1-2-6(9)5(8)3-4/h1-3,9H Y Key: HFZWRUODUSTPEG-UHFFFAOYSA-N Y InChI=1/C6H4Cl2O/c7-4-1-2-6(9)5(8)3-4/h1-3,9H Key: HFZWRUODUSTPEG-UHFFFAOYAU
SMILES Clc1cc(Cl)c(O)cc1
Properties
Chemical formula	C6H4Cl2O
Molar mass	163.00 g/mol
Appearance	White/off-white crystalline solid
Odor	Phenolic
Density	1.38g/cm3
Melting point	42 to 43 °C (108 to 109 °F; 315 to 316 K)
Boiling point	209 to 210 °C (408 to 410 °F; 482 to 483 K)
Solubility in water	5 g/100mL
Hazards
Safety data sheet	External MSDS
R-phrases	R22 R24 R34 R51/53
S-phrases	S26 S36/37/39 S45 S61
NFPA 704	1 4 0 COR
Flash point	114 °C (237 °F; 387 K)
Lethal dose or concentration (LD, LC):
LD50 (median dose)	47.0 mg/kg (Oral in rats) 790.0 mg/kg (Dermal exposure in mammals)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Y  (what is YN ?)
Infobox references

2,4-Dichlorophenol (2,4-DCP) is a chlorinated derivative of phenol with the molecular formula C₆H₄Cl₂O. 2,4-DCP is used primarily as an intermediate in the preparation of the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D). Annual worldwide production is estimated at 88 million pounds. It is also a photo-degradation product of the common antibacterial and antifungal agent triclosan along with the dioxin 2,8-dichlorodibenzo-p-dioxin.

Liquid (molten) 2,4-DCP is readily absorbed through the skin and contact with large amounts may be fatal. Solid 2,4-DCP does not readily absorb through skin and has a lower NFPA H=3 rating (versus H=4 for molten 2,4-DCP). This is primarily caused by instantaneous renal failure, liver damage and various other organ failure.