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Chemical Fact Sheet

Chemical Abstract Number (CAS #) 58902
CASRN 58-90-2
Synonyms2,3,4,6-Tetrachlorophenol
Phenol, 2,3,4,6-tetrachloro-
Dowicide 6
Analytical Methods EPA Method 8040
EPA Method 8270
Molecular FormulaC6H2Cl4O

Link to the National Library of Medicine's Hazardous Substances
Database for more details on this compound.

Use PESTICIDE SLIMICIDE FOR PAPER MILLS PRESERVATIVE; COMPONENT IN PENTACHLOROPHENOL WOOD PRESERVATIVE Fungicide The alkali salts of 2,3,4,6-tetrachlorophenol have been used in the USA for the control of sapstain fungus in wood, which cause the wood to absorb water, leading to accelerated decay. Sodium tetrachlorophenate has been used for this purpose in the USA for over 40 years but has been replaced recently by sodium pentachlorophenate . Sodium 2,3,4,6-tetrachlorophenate Tetrachlorophenol has been employed as a fungicide. Tetrachlorophenol
Apparent Color NEEDLES FROM LIGROIN, ACETIC ACID ; BROWN FLAKES OR SUBLIMED MASS ; LIGHT BROWN MASS
Odor STRONG ODOR
Boiling Point 64 deg C (3.0 kPa)
Melting Point 70 DEG C
Molecular Weight 231.89
Density 1.83 @ 25 DEG C/4 DEG C
Odor Threshold Concentration Odor threshold conc: 0.915-47.0 mg/l; detection: 0.6 mg/l.
Sensitivity Data Solid & 10% aq suspensions are not primary skin irritants. Dust may irritate nose & pharynx. Penta- and tetrachlorophenol /Tetrachlorophenol dust has been found irritating to the nose and throat . Tetrachlorophenol All chlorophenol dusts are irritating to the respiratory tract. Chlorophenols
Environmental Impact 2,3,4,6-Tetrachlorophenol enters the environment primarily in wastewater during its production and use as a wood preservative. This use is no longer permitted. It also may be released from the use of pentachlorophenol since it is a major impurity and degradation product of that chemical. If released on land it would tend to leach into the groundwater unless the soil was acidic where it would exist in the acid form rather than as an anion. No groundwater contamination with tetrachlorophenol has been reported. If released in water, it will adsorb to sediment and particulate matter and photodegrade in surface waters. Biodegradation can occur in soil and water where acclimated microbial populations occur but it is apt to be slow, based on a reported persistence of >72 days in a laboratory study using a soil inocculum. Moderate bioconcentration in fish may occur based on a 24 hr log BCF of 2.30 in guppies in static bioconcentration tests. If released into the atmosphere, 2,3,4,6-tetrachlorophenol would photodegrade, probably in somewhat over a day. Human exposure will primarily be from coming into contact with penta- or tetrachlorophenol treated products. Occupational exposure may occur via dermal or inhalation of contaminated dust.
Environmental Fate TERRESTRIAL FATE: If spilled on soil, 2,3,4,6-tetrachlorophenol would adsorb fairly strongly under acidic conditions, but since it exists principally as a phenolate ion at neutral and alkaline pHs, it would be expected to leach in soil. 2,3,4,6-Tetrachlorophenol will biodegrade where acclimated microbial populations occur but no rates of degradation are available. AQUATIC FATE: If released into water, 2,3,4,6-tetrachlorophenol will adsorb to sediment and particulate matter in the water column. It will probably photolyze in surface waters and possibly biodegrade very slowly if acclimated microorganisms are present. Volatilization would not be expected to be an important loss process. ATMOSPHERIC FATE: If released into the atmosphere, 2,3,4,6-tetrachlorophenol would photolyze. Although no half-lives are available, from data in other chlorophenols one might estimate that the half-life might be somewhat longer than the 1.5 days measured for pentachlorophenol.
Drinking Water Impact SURFACE WATER: Rhine River, The Netherlands (med/max (frequency of occurrence in %)) 1976- 0.14/0.38 ppb(88%); 1977- 0.08/.56 ppb(90%); 1979/1980- 0.07/0.20 ppb(92%)(1,2). Meuse and Ijssel Rivers, The Netherlands-(3 sites) 0.05-0.06 ppb . River-lake system in Sweden-site of chlorophenol spill: immediately downstream from spill on following day

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