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Pentachlorophenol Structure

Pentachlorophenol

Chemical Properties

Melting point 165-180 °C(lit.)
Boiling point 310 °C(lit.)
Density  1.978 g/mL at 25 °C(lit.)
vapor density  9.2 (vs air)
vapor pressure  40 mm Hg ( 211.2 °C)
refractive index  1.6310 (estimate)
Flash point 11 °C
storage temp.  0-6°C
solubility  Chloroform (Slightly), Ethyl Acetate (Sparingly)
pka 4.80 (Blackman et al., 1955)
5.3 (Eder and Weber, 1980)
Water Solubility  80 mg l-1(30 °C)
form  Liquid
Specific Gravity 1.979
Merck  7109
BRN  1285380
Henry's Law Constant 21 (quoted, Petrasek et al., 1983)
Exposure limits NIOSH REL: IDLH 0.5 mg/m3, IDLH 2.5 mg/m3; OSHA PEL: TWA 0.5 mg/m3; ACGIH TLV: TWA 0.5 mg/m3
Stability Stable. Incompatible with strong oxidizing agents.
CAS DataBase Reference 87-86-5(CAS DataBase Reference)
IARC 1 (Vol. 53, 71, 117) 2019
EPA Substance Registry System Pentachlorophenol (87-86-5)

Safety Information

Hazard Codes  T+,N,T,F,Xn
Risk Statements  24/25-26-36/37/38-40-50/53-39/23/24/25-23/24/25-11-52/53-51/53
Safety Statements  22-36/37-45-52-60-61-16-7
RIDADR  UN 3155 6.1/PG 2
WGK Germany  3
RTECS  SM6300000
HazardClass  6.1(a)
PackingGroup  II
HS Code  29081100
Hazardous Substances Data 87-86-5(Hazardous Substances Data)
Toxicity Pentachlorophenol (PCP) is very toxic to plants and are used as preharvest defoliants and general herbicides. Their use as herbicides is currently restricted to nonagricultural uses along drainage ditches, driveways, and fencerows.
Commercial (technical) grades of PCP commonly contain manufacturing by- products, such as dioxin (HxCDD), which can be more toxic than the PCP itself. Another contaminant in PCP is HCB (Hexachlorobenzene). The use of PCP is being phased out because of the discovery of these highly toxic contaminants (9). PCP is a Restricted Use Pesticide (RUP). Restricted Use Pesticides may be purchased and used only by certified applicators.
In 1988 the EPA announced further restrictions on the use of PCP as in the pulp and paper industry where it is used in paper coatings, sizing, adhesives and in inks. Registration for use in cooling towers and for certain oil well operations was also cancelled. The 1988 regulations also required compliance with dioxin (HxCDD) concentration limits in the final product.
IDLA 2.5 mg/m3

MSDS

Usage And Synthesis

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