Pentachlorophenol

Pentachlorophenol
Names
	Preferred IUPAC name Pentachlorophenol
	Other names Santophen, Pentachlorol, Chlorophen, Chlon, Dowicide 7, Pentacon, Penwar, Sinituho, Penta
Identifiers
CAS Number	87-86-5 ;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:17642 ;
ChEMBL	ChEMBL75967 ;
ChemSpider	967 ;
ECHA InfoCard	100.001.617
KEGG	C02575 ;
PubChem CID	992;
UNII	D9BSU0SE4T ;
CompTox Dashboard (EPA)	DTXSID7021106 ;
	InChI InChI=1S/C6HCl5O/c7-1-2(8)4(10)6(12)5(11)3(1)9/h12H Key: IZUPBVBPLAPZRR-UHFFFAOYSA-N ; InChI=1/C6HCl5O/c7-1-2(8)4(10)6(12)5(11)3(1)9/h12H Key: IZUPBVBPLAPZRR-UHFFFAOYAG;
	SMILES Oc1c(Cl)c(Cl)c(Cl)c(Cl)c1Cl;
Properties
Chemical formula	C6HCl5O
Molar mass	266.34
Appearance	White crystalline solid
Odor	benzene-like
Density	1.978 g/cm3 at 22 °C
Melting point	189.5 °C (373.1 °F; 462.6 K)
Boiling point	310 °C (590 °F; 583 K) (decomposes)
Solubility in water	0.020 g/L at 30 °C
Vapor pressure	0.0001 mmHg (25°C)
Thermochemistry
Heat capacity (C)	202.0 J·mol−1·K−1
Std molar; entropy (S⦵298)	253.2 J·mol−1·K−1
Std enthalpy of; formation (ΔfH⦵298)	-292.5 kJ·mol−1
Hazards
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	117 mg/kg (mouse, oral); 128 mg/kg (hamster, oral); 17 mg/kg (rat, oral); 150 mg/kg (rat, oral)
LDLo (lowest published)	70 mg/kg (rabbit, oral)
LC50 (median concentration)	355 mg/m3 (rat); 225 mg/m3 (mouse)
	NIOSH (US health exposure limits):
PEL (Permissible)	TWA 0.5 mg/m3 [skin]
REL (Recommended)	TWA 0.5 mg/m3 [skin]
IDLH (Immediate danger)	2.5 mg/m3
	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

Pentachlorophenol (PCP) is an organochlorine compound used as a pesticide and a disinfectant. First produced in the 1930s, it is marketed under many trade names. It can be found as pure PCP, or as the sodium salt of PCP, the latter of which dissolves easily in water. It can be biodegraded by some bacteria, including Sphingobium chlorophenolicum.

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