Testing Information

Testing Status of Agents at NTP

CAS Registry Number: 87-86-5

Print this page Easy Link

http://ntp.niehs.nih.gov/go/25408

Selected information from two of the National Library of Medicine's databases: ChemIDPlus1 and HSDB2.

Names (NTP)

  • Pentachlorophenol, Dowicide EC-7
  • Pentachlorophenol, DP-2
  • Pentachlorophenol, purified
  • Pentachlorophenol, technical
  • PENTACHLOROPHENOL (TRANSGENIC LECM)
  • TRANSGENIC-LABORATORY OF ENVIRONMENTAL CARCINOGENESIS & MUTAGENESIS (PENTACHLOROPHENOL)
  • Transgenic LECM (Pentachlorophenol)

Structure

Chemical Structure for CAS Registry Number 87-86-5 from NLM

Back to top

Chemical Properties2

Property Description
Color/Form
  • COLORLESS CRYSTALS (TECH; DARK GREY)
  • Colorless to light-brown flakes or crystals
  • White monoclinic, crystalline solid
  • Needle-like crystals
  • Colorless to white crystalline solid.
Odor
  • PHENOLIC ODOR
  • VERY PUNGENT ODOR ONLY WHEN HOT
  • Benzene-like odor.
Taste
  • Taste threshold of 30 ug/l.
Boiling Point
  • 309-310 DEG C (DECOMP)
Melting Point
  • 174 deg C (monohydrate); 191 deg C (anhydrous)
Molecular Weight
  • 266.34
Corrosivity
  • Noncorrosive in absence of moisture
Critical Temperature & Pressure
  • None found
Density/Specific Gravity
  • 1.978 AT 22 DEG C/4 DEG C
Disassociation Constants
  • pKa= 4.70
Heat of Combustion
  • None found
Heat of Vaporization
  • 16,742.6 gcal/gmole
log P (octanol-water)
  • log Kow= 5.12
pH
  • None found
Solubilities
  • In water, 14 mg/l at 26.7 deg C.
  • SLIGHTLY SOL IN PETROLEUM ETHER
  • SOL IN MOST ORGANIC SOLVENTS; SLIGHTLY SOL IN PARAFFINS
  • Sol in ether
  • Sol in dilute alkali, carbitol, cellosolve
  • 2 g/100 g in carbon tetrachloride at 20 deg C
  • 8.5 g/100 g in o-dichlorobenzene at 20 deg C
  • 3.1 g/100 g in diesel oil @ 20 deg C
  • 32 g/100 g in pine oil @ 20 deg C
  • 1.5 g/100 g in Stoddard solvent @ 20 deg C
  • In acetone: 50 g/100 g @ 25 deg C
  • In benzene: 15 g/100 g @ 25 deg C
  • In diacetone alcohol: 190 g/100 g @ 25 deg C
  • In ethanol (95%): 120 g/100 g @ 25 deg C
  • In methanol: 180 g/100 g @ 25 deg C
  • In isopropanol: 85 g/100 g at 25 deg C
  • In ethylene glycol: 11 g/100 g @ 25 deg C
  • Water Solubility: 5 mg/l in water @ 0 deg C; 14 mg/l in water @ 20 deg C; 35 mg/l in water @ 50 deg C; 85 mg/l in water @ 70 deg C
Spectral Properties
  • MAX ABSORPTION (ALCOHOL): 300.5 NM (LOG E= 3.4); 308 NM (LOG E= 3.4); SADTLER REFERENCE NUMBER: 279 (IR, PRISM); 96 (IR, GRATING)
  • Intense mass spectral peaks: 266 m/z (100%), 268 m/z (70%), 264 m/z (68%), 165 m/z (54%)
  • IR: 3657 (Coblentz Society Spectral Collection)
  • UV: 112 (Sadtler Research Laboratories Spectral Collection)
  • MASS: 1889 (National Bureau of Standards EPA-NIH Mass Spectra Data Base, NSRDS-NBS-63)
  • Intense mass spectral peaks: 200 m/z, 228 m/z
  • Infrared (prism(279)); grating (96), ultraviolet (112) and nuclear magnetic resonance (proton (39667); C-13 (26001)) spectral data have been reported.
Surface Tension
  • None found
Vapor Density
  • 9.20 (air= 1)
Vapor Pressure
  • 0.00011 mm Hg at 25 deg C
Relative Evaporation Rate
  • None found
Viscosity
  • None found
Other Properties
  • DENSITY OF SATURATED AIR: 1.0000011 (AIR= 1); PERCENT IN SATURATED AIR: 0.0000145% BY VOLUME AT 20 DEG C; 1 MG/L IS EQUIVALENT TO 91.9 PPM & 1 PPM IS EQUIVALENT TO 0.01088 MG/L AT 25 DEG C
  • Henry's Law constant = 2.45X10-8 atm-cu m/mole

Back to top

Uses2

  • AS A MOLLUSCICIDE
  • TO INHIBIT FERMENTATION IN VARIOUS MATERIALS
  • Used as a preharvest defoliant on selected crops /Former/
  • In various products, pentachlorophenol has been used as a herbicide, algacide, defoliant, wood preservative, germicide, fungicide, and molluscicide. As a wood preservative, it is commonly applied as a 0.1% solution in mineral spirits, NO 2 fuel oil, or kerosene. It is used in pressure treatment of lumber at 5% concentration. Weed killers contain higher concentrations. PCP is no longer available for over-the-counter sale in the USA.
  • Insecticide for termite control; pre-harvest defoliant; general herbicide. Has been recommended for use in the preservation of wood, wood products, starches, dextrins, glues.
  • The main commercial use of pentachlorophenol is as a wood preservative...it is used as a fungicide to protect wood from fungal decay and wood-boring insects...it is used as a pre-harvest defoliant in cotton and as a general pre-emergence, non-selective contact herbicide...it has been used as a bactericide in drilling fluids, as a fungicide in adhesives and textiles and for slime control in pulp and paper manufacture...pentachlorophenol has also been used to control the snails that are the hosts of schistosomiasis.
  • Pentachlorophenol is used to control termites and, frequently, as an ester (such as pentachlorophenyl laurate) to protect wood from fungal rots and wood-boring insects, and as a general herbicide. The sodium salt is used as a general disinfectant, e.g. for trays in mushroom houses.

Back to top

Superlist Classes1

  • ATSDR Profile Priority List, rank : 45
  • Reportable Quantity (RQ) = 10 lb
  • TWA 0.5 mg/m3; skin; Confirmed animal carcinogen with unknown relevance to humans; BEI
  • TWA 0.5 mg/m3; skin

Back to top

Notes (Sources: NTP,HSDB,RTECS,MESH)1

  • None found

Back to top

Other Registry Numbers1

  • 101802-54-4
  • 39390-77-7

Back to top

Synonyms (Sources: NTP, HSDB,RTECS,MESH)1

  • 4-06-00-01025 (Beilstein Handbook Reference)
  • AD 73
  • AI3-00134
  • BRN 1285380
  • Chem-Penta
  • Chem-Tol
  • Chlon
  • Chlorophen
  • CM 613
  • CP 1309
  • Dow pentachlorophenol DP-2 antimicrobial
  • Dowicide 7
  • Dowicide 7 Antimicrobial
  • Dowicide EC-7
  • Dura Treet II
  • Durotox
  • Forpen-50 Wood Preservative
  • Fungifen
  • Grundier arbezol
  • HSDB 894
  • 1-Hydroxypentachlorobenzene
  • Lauxtol
  • Liroprem
  • MB 333
  • NCI-C54933
  • NCI-C55378
  • NCI-C56655
  • Ontrack WE Herbicide
  • Ortho Triox Liquid Vegetation Killer
  • Osmose Wood Preserving Compound
  • PCP (pesticide)
  • Penchlorol
  • Penta
  • Penta Concentrate
  • Penta ready
  • Penta WR
  • Pentachlorofenol
  • Pentachlorophenol
  • 2,3,4,5,6-Pentachlorophenol
  • Pentachlorophenol, DP-2
  • Pentacon
  • Penta-kil
  • Penwar
  • Peratox
  • Permacide
  • Permagard
  • Permasan
  • Permatox DP-2
  • Permatox penta
  • Permite
  • Pol Nu
  • Pole topper fluid
  • Preventol P
  • RCRA waste number U242
  • Santophen 20
  • Thompson's wood fix
  • Watershed Wood Preservative
  • Weed and Brush Killer
  • Weedone
  • Witophen P
  • Woodtreat A

Back to top

Links to Additional Information1

Back to top

Footnotes

1 Source: the National Library of Medicine's ChemIDPlus, 10/28/2007.

2 Source: the National Library of Medicine's Hazardous Substance Database, 10/28/2007.

Back to top

Web page last updated on May 14, 2008