| 2,4,5-trichlorophenol |
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GENERAL INFORMATION 
for 2,4,5-trichlorophenol
Description: Active substance and pesticide transformation product with fungicial and herbicidal action, used particularly for the control of broad-leaved weeds in grass
Example pests controlled: Gorse; Brush weeds; Thistles
Example applications: -
Efficacy & activity: -
Availability status: Obsolete, banned
Introduction & key dates: circa 1945
EC Regulation 1107/2009 (repealing 91/414):
| Status | Not approved |
| Dossier rapporteur/co-rapporteur | Not applicable |
| Date inclusion expires | Expired |
| EU Candidate for substitution (CfS) | Not applicable |
| Listed in EU database | Yes |
Approved for use (
) or known to be used (
) in the following European countries: 
AT |
BE |
BG |
CY |
CZ |
DE |
DK |
EE |
EL |
ES |
FI |
FR |
HR |
HU |
IE |
IT |
LT |
LU |
LV |
MT |
NL |
PL |
PT |
RO |
SE |
SI |
SK |
UK |
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Chemical structure:
| Isomerism | - |
| Chemical formula | C6H3Cl3O |
| Canonical SMILES | C1=C(C(=CC(=C1Cl)Cl)Cl)O |
| Isomeric SMILES | No data |
| International Chemical Identifier key (InChIKey) | LHJGJYXLEPZJPM-UHFFFAOYSA-N |
| International Chemical Identifier (InChI) | InChI=1S/C6H3Cl3O/c7-3-1-5(9)6(10)2-4(3)8/h1-2,10H |
| 2D structure diagram/image available? | Yes |
General status:
| Pesticide type | Fungicide, Herbicide, Bactericide, Metabolite, Other substance | |||
| Metabolite Type | Soil, Plant, Water, Groundwater | |||
| Other constituent type | Impurity | |||
| Substance group | Unclassified | |||
| Minimum active substance purity | - | |||
| Known relevant impurities | - | |||
| Substance origin | Synthetic | |||
| Mode of action | Causes distorted growth that affects respiration and cell function | |||
| CAS RN | 95-95-4 | |||
| EC number | 202-467-8 | |||
| CIPAC number | 6 | |||
| US EPA chemical code | 064210 | |||
| PubChem CID | 44147467 | |||
| Molecular mass (g mol-1) | 197.45 | |||
| PIN (Preferred Identification Name) | - | |||
| IUPAC name | 1-hydroxy-2,4,5-trichlorobenzene | |||
| CAS name | 2,4,5-trichlorophenol | |||
| Other status information | POP; Chemical subject to PIC regulations | |||
| Relevant Environmental Water Quality Standards | - | |||
| Herbicide Resistance Classification (HRAC) | Not known | |||
| Herbicide Resistance Classification (WSSA) | - | |||
| Insecticide Resistance Classification (IRAC) | Not applicable | |||
| Fungicide Resistance Classification (FRAC) | Not known | |||
| Examples of recorded resistance | - | |||
| Physical state | Grey crystalline solid | |||
| Related substances & organisms | ||||
Can be a metabolite of:
| Parent | Formation medium | Estimated maximum occurrence fraction | 1107/2009 relevancy |
|
| 2,3,6-TBA | Soil | - | ||
| 2,4,5-trichlorophenoxyacetic acid | Water | - | ||
Formulations:
| Property |
Value | |||
| Example manufacturers & suppliers of products using this active now or historically | - | |||
| Example products using this active | - | |||
| UK LERAP status | No UK approval for use as a pesticide under EC Regulation 1107/2009 | |||
| Formulation and application details | - | |||
ENVIRONMENTAL FATE
for 2,4,5-trichlorophenol
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| Solubility - In water at 20oC (mg l-1) | 1200 | V3 - @ 25 DegC | High | |
| Solubility - In organic solvents at 20oC (mg l-1) | - | - | - | |
| Melting point (oC) | 68 | V3 | - | |
| Boiling point (oC) | 247 | V3 | - | |
| Degradation point (oC) | - | - | - | |
| Flashpoint (oC) | Not expected to self ignite; Not highly flammable | V3 | - | |
| Octanol-water partition coefficient at pH 7, 20oC | P | 5.25 X 1003 | Calculated | - |
| Log P | 3.72 | V3 | High | |
| Bulk density (g ml-1)/Specific gravity | 1.68 | V3 | - | |
| Dissociation constant (pKa) at 25oC | 7.4 | V3 | - | |
| Note: Weak acid | ||||
| Vapour pressure at 20oC (mPa) | 0.0029 | Q3 | Low volatility | |
| Henry's law constant at 25oC (Pa m3 mol-1) | 0.16 | V3 | Moderately volatile | |
GUS leaching potential index  |
- | - | - | |
| SCI-GROW groundwater index (μg l-1) for a 1 kg ha-1 or 1 l ha-1 application rate |
Value | - | - | - |
| Note | - | |||
| Potential for particle bound transport index |
- | - | - | |
| Maximum UV-vis absorption L mol-1 cm-1 | - | - | - | |
| Surface tension (mN m-1) | - | - | - | |
Degradation:
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
General biodegradability | - |
| Soil degradation (days) (aerobic) | DT50 (typical) | - | - | - |
| DT50 (lab at 20oC) | - | - | - | |
| DT50 (field) | - | - | - | |
| DT90 (lab at 20oC) | - | - | - | |
| DT90 (field) | - | - | - | |
| DT50 modelling endpoint | - | - | - | |
| Note: | - | |||
| Dissipation rate RL50 on plant matrix | Value | 11.3 | R3 | - |
| Note | Turfgrass, n=1 | |||
| Dissipation rate RL50 on and in plant matrix | Value | - | - | - |
| Note | - | |||
| Aqueous photolysis DT50 (days) at pH 7 | Value | - | - | - |
| Note | - | |||
| Aqueous hydrolysis DT50 (days) at 20oC and pH 7 | Value | - | - | - |
| Note | - | |||
| Water-sediment DT50 (days) | - | - | - | |
| Water phase only DT50 (days) | - | - | - | |
Soil adsorption and mobility:
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| Linear | Kd | - | Q2 | Slightly mobile |
| Koc | 836 | |||
| Notes and range | Estimated | |||
| Freundlich | Kf | - | - | - |
| Kfoc | - | |||
| 1/n | - | |||
| Notes and range | - | |||
| pH sensitivity | - | |||
ECOTOXICOLOGY
for 2,4,5-trichlorophenol
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| Bio-concentration factor | BCF (l kg-1) | 131 | Q2 | Threshold for concern |
| CT50 (days) | Not available | - | ||
| Mammals - Acute oral LD50 (mg kg-1) | 820 | V3 Rat | Moderate | |
| Mammals - Short term dietary NOEL | (mg kg-1) | - | - | - |
| (ppm diet) | - | - | ||
| Birds - Acute LD50 (mg kg-1) | - | - | - | |
| Birds - Short term dietary (LC50/LD50) | - | - | - | |
| Fish - Acute 96 hour LC50 (mg l-1) | 0.49 | F4 Oncorhynchus mykiss | Moderate | |
| Fish - Chronic 21 day NOEC (mg l-1) | 0.0625 | P3 Oncorhynchus mykiss, growth | Moderate | |
| Aquatic invertebrates - Acute 48 hour EC50 (mg l-1) | 0.9 | F4 Daphnia magna | Moderate | |
| Aquatic invertebrates - Chronic 21 day NOEC (mg l-1) | 0.375 | P3 Daphnia magna | Moderate | |
| Aquatic crustaceans - Acute 96 hour LC50 (mg l-1) | 3.83 | F3 Americamysis bahia | Moderate | |
| Sediment dwelling organisms - Acute 96 hour LC50 (mg l-1) | - | - | - | |
| Sediment dwelling organisms - Chronic 28 day NOEC, static, water (mg l-1) | - | - | - | |
| Sediment dwelling organisms - Chronic 28 day NOEC, sediment (mg kg-1) | - | - | - | |
| Aquatic plants - Acute 7 day EC50, biomass (mg l-1) | - | - | - | |
| Non-target plants | - | - | - | |
| - | - | - | ||
| Algae - Acute 72 hour EC50, growth (mg l-1) | 1.2 | F4 Pseudokirchneriella subcapitata | Moderate | |
| Algae - Chronic 96 hour NOEC, growth (mg l-1) | - | - | - | |
| Honeybees (Apis spp.) | Contact acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) | - | - | - |
| Oral acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) | - | - | - | |
| Unknown mode acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) | > 50 | Q3 | Moderate | |
| Bumblebees (Bombus spp.) | Contact acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) | - | - | - |
| - | ||||
| Oral acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) | - | - | - | |
| - | ||||
| Mason bees (Osmia spp.) | Contact acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) | - | - | - |
| Oral acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) | - | - | - | |
| Other pollinators (1) | Acute LD50 (worst case from 24 , 48 and 72 hour values - μg insect-1) | - | - | - |
| Mode of exposure | - | |||
| Other pollinators (2) | Acute LD50 (worst case from 24 , 48 and 72 hour values - μg insect-1) | - | - | - |
| Mode of exposure | - | |||
| Earthworms - Acute 14 day LC50 (mg kg-1) | 46 | F4 Eisenia andrei | Moderate | |
| Earthworms - Chronic NOEC, reproduction (mg kg-1) | - | - | - | |
| Other soil macro-organisms | Acute LC50 (mg kg-1) | - | - | - | Chronic NOEC (mg kg-1) | - | - | - |
| Other arthropod (1) | LR50 g ha-1 | - | - | - |
| % Effect | - | - | - | |
| Other arthropod (2) | LR50 g ha-1 | - | - | - |
| % Effect | - | - | - | |
| Soil micro-organisms | - | - | - | |
| Mesocosm study data | NOEAEC mg l-1 | - | - | - |
| NOEAEC mg l-1 | - | - | - | |
HUMAN HEALTH AND PROTECTION
for 2,4,5-trichlorophenol
General:
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| Threshold of Toxicological Concern (Cramer Class) |
High (class III) | - | - | |
| Mammals - Acute oral LD50 (mg kg-1) | 820 | V3 Rat | Moderate | |
| Mammals - Dermal LD50 (mg kg-1 body weight) | - | - | - | |
| Mammals - Inhalation LC50 (mg l-1) | - | - | - | |
| Other Mammal toxicity endpoints | - | - | ||
| ADI - Acceptable Daily Intake (mg kg-1bw day-1) | 0.03 | JMPR 1981 | - | |
| ARfD - Acute Reference Dose (mg kg-1bw day-1) | 0.1 | US EPA | - | |
| AAOEL - Acute Acceptable Operator Exposure Level (mg kg-1 bw day-1) | - | - | - | |
| AOEL - Acceptable Operator Exposure Level - Systemic (mg kg-1bw day-1) | - | - | - | |
| Dermal penetration studies (%) | - | - | - | |
| Dangerous Substances Directive 76/464 | - | - | - | |
| Exposure Routes | Public | Negligible risk to bystanders | ||
| Occupational | Exposure may occur via inhalation or skin absorption | |||
| European MRLs | Click here for the EU MRL pesticide database | |||
| Drinking Water Standards | - | - | - | |
| Drinking Water MAC (μg l-1) | - | - | - | |
Health issues:
| Carcinogen | Genotoxic | Endocrine disrupter | Reproduction / development effects | Cholinesterase inhibitor | Neurotoxicant | |||
|
A3; B0; C0; D0; E0 |
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| Respiratory tract irritant | Skin irritant | Skin sensitiser | Eye irritant | Phototoxicant | ||||
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| General human health issues | May be toxic to gastrointestinal tract, skin May cause hypotension, myocardial failure and pulmonary edema |
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| Key: Genotoxicity A: Chromosome aberration (EFSA database) B: DNA damage/repair (EFSA database) C: Gene mutation (EFSA database) D: Genome mutation (EFSA database) E: Unspecified genotoxicity type (miscellaneous data source) 0: No data 1: Positive 2: Mixed/ambiguous results 3: Negative |
Key: Other : Yes, known to cause a problem  : No, known not to cause a problem  : Possibly, status not identified - : No data found |
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Handling issues:
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| General |
Corrosive | |||
| CLP classification 2013 | - | |||
| EC Risk Classification |
Xn - Harmful: R22 Xi - Irritant: R36/38 N - Dangerous for the environment: R50, R53 |
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| EC Safety Classification |
- | |||
| WHO Classification | O | - | Obsolete substance | |
| UN Number | 2020 | |||
| Waste disposal & packaging |
- | |||
TRANSLATIONS
for 2,4,5-trichlorophenol
| Language | Name |
| English | 2,4,5-trichlorophenol |
| French | - |
| German | - |
| Danish | 2,4,5-trichlorphenol |
| Italian | - |
| Spanish | - |
| Greek | - |
| Slovenian | 2,4,5-triklorfenol |
| Polish | 2,4,5-trichlorofenol |
| Swedish | - |
| Hungarian | - |
| Dutch | - |
Record last updated: Wednesday 27 November 2019
Contact: aeru@herts.ac.uk