2,4-dichlorophenol
Structural formula | ||||||||||||||||
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General | ||||||||||||||||
Surname | 2,4-dichlorophenol | |||||||||||||||
other names |
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Molecular formula | C 6 H 4 Cl 2 O | |||||||||||||||
Brief description |
colorless crystal needles with a phenolic odor |
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properties | ||||||||||||||||
Molar mass | 163.00 g mol −1 | |||||||||||||||
Physical state |
firmly |
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density |
1.38 g cm −3 (25 ° C) |
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Melting point |
40-43 ° C |
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boiling point |
209-211 ° C |
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Vapor pressure |
0.116 mmHg (25 ° C) |
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solubility |
poor in water (4.5 g l −1 at 20 ° C) |
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safety instructions | ||||||||||||||||
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As far as possible and customary, SI units are used. Unless otherwise noted, the data given apply to standard conditions . |
2,4-Dichlorophenol is a colorless solid with a phenol- like odor that belongs to the group of chlorophenols .
When 2,4-dichlorophenol is heated, low- chlorinated congeners of polychlorinated dibenzodioxins can be formed with the elimination of hydrogen chloride .
Occurrence
2,4-dichlorophenol is a metabolite of plant protection products such as nitrofen , 2,4-dichlorophenoxyacetic acid and 2,4-dichlorophenoxypropionic acid .
properties
2,4-dichlorophenol is a flammable solid that dissolves only very little in water (4.5 g / l). The substance is readily soluble in non-polar, organic solvents ( hydrocarbons ) as well as in oils and fats. The colorless crystals have an odor that is reminiscent of phenol.
use
2,4-dichlorophenol is used industrially for the production of pesticides ( herbicides ) such as bifenox , chlomethoxyfen , 2,4-D , 2,4-DB , dichlofenthion , dichlorprop and diclofop-methyl , moth repellants for textiles and as an additive for antifungal agents in stockings and Shoe insoles. Also polyester be prepared from 2,4-dichlorophenol.
safety instructions
2,4-dichlorophenol is flammable, which can produce poisonous gases such as chlorine , hydrogen chloride, phosgene and dioxins. The mixture can react explosively when distilled in the presence of air. The compound is corrosive and toxic and is mainly absorbed through the skin; it can be assumed that vapors are also absorbed via the respiratory tract. Eyes, skin, mucous membranes and airways are irritated or burned. 2,4-Dichlorophenol, like many chlorinated compounds, has a toxic effect on the CNS , liver and kidneys. Symptoms of intoxication are headache, dizziness, weakness, confusion, muscle twitching, tachycardia and even loss of consciousness. In 1992, a wetting of about 10% of the body surface led to the death of the person concerned within 20 minutes despite rinsing with water and resuscitation measures.
Web links
- Risk assessment of 2,4-dichlorophenol English, (PDF file; 545 kB)
See also
Individual evidence
- ↑ a b c d e f g h i j Entry on 2,4-dichlorophenol in the GESTIS substance database of the IFA , accessed on January 9, 2019(JavaScript required) .
- ↑ Entry on 2,4-dichlorophenol in the ChemIDplus database of the United States National Library of Medicine (NLM), accessed on June 6, 2017.
- ↑ Entry on 2,4-dichlorophenol in the Classification and Labeling Inventory of the European Chemicals Agency (ECHA), accessed on February 1, 2016. Manufacturers or distributors can expand the harmonized classification and labeling .