| chlorfenson (Ref: K 6451) |
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SUMMARY
Chlorfenson is an obsolete insecticide. It has a low aqueous solubility and a low volatility. Data on its persistence in soil and water systems is missing. It has a low mammalian oral toxicity and throught to be a skin irritant. data on ecotoxicology is scant but it does appear to have a low toxicity to birds and a moderate toxicity to fish. GENERAL INFORMATION 
for chlorfenson
Description: A non-selective, diphenyl obsolete acaricide
Example pests controlled: Spider mites
Example applications: Fruit including citrus; Cotton; Hops; Vegetables; Ornamentals
Efficacy & activity: -
Availability status: Obsolete
Introduction & key dates: 1949, first reported
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 | None |
| Chemical formula | C12H8Cl2O3S |
| Canonical SMILES | C1=CC(=CC=C1OS(=O)(=O)C2=CC=C(C=C2)Cl)Cl |
| Isomeric SMILES | No data |
| International Chemical Identifier key (InChIKey) | RZXLPPRPEOUENN-UHFFFAOYSA-N |
| International Chemical Identifier (InChI) | InChI=1S/C12H8Cl2O3S/c13-9-1-5-11(6-2-9)17-18(15,16)12-7-3-10(14)4-8-12/h1-8H |
| 2D structure diagram/image available? | Yes |
General status:
| Pesticide type | Acaricide, Miticide, Insecticide | |||
| Substance group | Bridged diphenyl | |||
| Minimum active substance purity | - | |||
| Known relevant impurities | - | |||
| Substance origin | Synthetic | |||
| Mode of action | Acts by inhibiting oxidative phosphorylation. Contact and stomach action and long residual ovicidal activity. | |||
| CAS RN | 80-33-1 | |||
| EC number | 201-270-4 | |||
| CIPAC number | 53 | |||
| US EPA chemical code | 020201 | |||
| PubChem CID | 6635 | |||
| Molecular mass (g mol-1) | 303.2 | |||
| PIN (Preferred Identification Name) | 4-chlorophenyl 4-chlorobenzene-1-sulfonate | |||
| IUPAC name | 4-chlorophenyl 4-chlorobenzenesulfonate | |||
| CAS name | 4-chlorophenyl 4-chlorobenzenesulfonate | |||
| Other status information | - | |||
| Relevant Environmental Water Quality Standards | - | |||
| Herbicide Resistance Classification (HRAC) | Not applicable | |||
| Herbicide Resistance Classification (WSSA) | Not applicable | |||
| Insecticide Resistance Classification (IRAC) | Not known | |||
| Fungicide Resistance Classification (FRAC) | Not applicable | |||
| Examples of recorded resistance | Panonychus citri Panonychus ulmi Tetranychus mcdanieli Tetranychus urticae |
|||
| Physical state | White crystalline solid | |||
| Related substances & organisms | - | |||
Formulations:
| Property |
Value | |||
| Example manufacturers & suppliers of products using this active now or historically |
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| Example products using this active |
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| UK LERAP status | No UK approval for use as a pesticide under EC Regulation 1107/2009 | |||
| Formulation and application details | Usually supplied as a wettable powder or emulsifiable concentrate. | |||
ENVIRONMENTAL FATE
for chlorfenson
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| Solubility - In water at 20oC (mg l-1) | 2.96 | V3 - @ 25 DegC | Low | |
| Solubility - In organic solvents at 20oC (mg l-1) | 410000 | CA3 - Carbon tetrachloride | - | |
| 1100000 | CA3 - Cyclohexanone | - | ||
| 780000 | CA3 - Xylene | - | ||
| 1300000 | CA3 - Acetone | - | ||
| Melting point (oC) | 86.5 | CA3 | - | |
| Boiling point (oC) | - | - | - | |
| Degradation point (oC) | - | - | - | |
| Flashpoint (oC) | - | - | - | |
| Octanol-water partition coefficient at pH 7, 20oC | P | 1.62 X 1004 | Calculated | - |
| Log P | 4.21 | V3 | High | |
| Bulk density (g ml-1)/Specific gravity | - | - | - | |
| Dissociation constant (pKa) at 25oC | - | - | - | |
| Note: | ||||
| Vapour pressure at 20oC (mPa) | 0.25 | V3 - @ 25 degC | Low volatility | |
| Henry's law constant at 25oC (Pa m3 mol-1) | 1.66 X 10-02 | V3 - @ 25 degC | Non-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 | 5.35 X 10-03 | Calculated | - |
| Note | Estimated concentrations of chemicals with Koc values greater than 9995 ml g-1 are beyond the scope of the regression data used in SCI-GROW development. If there are concerns for such chemicals, a higher tier groundwater exposure assessment should be considered, regardless of the concentration returned by SCI-GROW | |||
| 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 | - | - | - |
| Note | - | |||
| Dissipation rate RL50 on and in plant matrix | Value | 5.0 | R3 | - |
| Note | Orange peel, n=1 | |||
| 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 | - | CA2 | Non-mobile |
| Koc | 17000 | |||
| Notes and range | Estimated | |||
| Freundlich | Kf | - | - | - |
| Kfoc | - | |||
| 1/n | - | |||
| Notes and range | - | |||
| pH sensitivity | - | |||
Other known metabolites:
| Metabolite name and reference | Aliases | Formation medium / Rate | Estimated maximum occurrence fraction | Metabolising enzymes |
| p-chlorobenzenesulfonic acid | - | Plants; Cockroach | - | - |
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| Bio-concentration factor | BCF (l kg-1) | 300 | Q2 Estimated | Threshold for concern |
| CT50 (days) | Not available | - | ||
| Mammals - Acute oral LD50 (mg kg-1) | > 2000 | L3 Rat | Low | |
| Mammals - Short term dietary NOEL | (mg kg-1) | - | - | - |
| (ppm diet) | - | - | ||
| Birds - Acute LD50 (mg kg-1) | > 4600 | V3 Phasianidae | Low | |
| Birds - Short term dietary (LC50/LD50) | - | - | - | |
| Fish - Acute 96 hour LC50 (mg l-1) | 0.7 | F4 Lepomis macrochirus | Moderate | |
| Fish - Chronic 21 day NOEC (mg l-1) | - | - | - | |
| Aquatic invertebrates - Acute 48 hour EC50 (mg l-1) | - | - | - | |
| Aquatic invertebrates - Chronic 21 day NOEC (mg l-1) | - | - | - | |
| Aquatic crustaceans - Acute 96 hour LC50 (mg l-1) | - | - | - | |
| 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) | - | - | - | |
| Algae - Chronic 96 hour NOEC, growth (mg l-1) | - | - | - | |
| Honeybees | Contact acute 48 hour LD50 (μg bee-1) | - | - | - |
| Oral acute 48 hour LD50 (μg bee-1) | - | - | - | |
| Unknown mode acute 48 hour LD50 (μg bee-1) | - | - | - | |
| Earthworms - Acute 14 day LC50 (mg kg-1) | - | - | - | |
| Earthworms - Chronic 14 day NOEC, reproduction (mg kg-1) | - | - | - | |
| Other soil macro-organisms - e.g. Collembola | LR50 / EC50 / NOEC / % Effect | - | - | - |
| Other arthropod (1) | LR50 g ha-1 | - | - | - |
| % Effect | Harmless | AB1 Typhlodromus pyri | - | |
| 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 chlorfenson
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) | > 2000 | L3 Rat | Low | |
| 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) | 0.01 | JMPR 1965 | - | |
| ARfD - Acute Reference Dose (mg kg-1bw day-1) | - | - | - | |
| 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 Limits | - | - | - | |
| Exposure Routes | Public | - | ||
| Occupational | - | |||
| European MRLs | Click here for the EU MRL pesticide database | |||
| Drinking Water Standards | - | - | - | |
| Drinking Water MAC (μg l-1) | - | - | - | |
Health issues:
| Carcinogen | Mutagen | Endocrine disrupter | Reproduction / development effects | Cholinesterase inhibitor | Neurotoxicant | |||
- |
- |
- |
- |
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- |
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| Respiratory tract irritant | Skin irritant | Skin sensitiser | Eye irritant | Phototoxicant | ||||
- |
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- |
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- |
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| General human health issues | Harmful if swallowed Possible kidney toxicant |
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: Yes, known to cause a problem
: No, known not to cause a problem
: Possibly, status not identified
- : No data found
Handling issues:
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| General |
When heated to decomposition it emits very toxic fumes | |||
| CLP classification 2013 | Health: H302, H315 Environment: H400, H410 |
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| EC Risk Classification |
Xn - Harmful: R22 Xi - Irritant: R38 N - Dangerous for the environment: R50, R53 |
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| EC Safety Classification |
S2, S37, S60, S61 | |||
| WHO Classification | III | - | Slightly hazardous | |
| US EPA Classification (formulation) | No consensus across products or no products available | - | - | |
| UN Number | - | |||
| Waste disposal & packaging |
- | |||
| Language | Name |
| English | chlorfenson |
| French | chlorfenson |
| German | Chlorfenson |
| Danish | chlorfenson |
| Italian | clorfenson |
| Spanish | clorfenson |
| Greek | chlorfenson |
| Slovenian | klorfenson |
| Polish | chlorofenson |
| Swedish | - |
| Hungarian | - |
| Dutch | chloorfenson |
Record last updated: Monday 28 May 2018
Contact: aeru@herts.ac.uk