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fonofos (Ref: N-2790)
** fonophos ** dyfonate ** difonate ** Translations

Environmental Fate - Ecotoxicology - Human Health - A to Z Index - Home

GENERAL INFORMATION Click here for an explantaion of the general chemical status information
for fonofos

Description: An obsolete soil acting insecticide once used on various crops but predominately corn to control various sucking pests

Example pests controlled: Aphids, Corn rootworm; Wireworm; Cutworms; White grubs; Corn maggots; Symphylans

Example applications: Vegetables including asparagus, beans, onions, peppers, sweet potatoes; Ornamentals; Corn; Turf and lawns

Efficacy & activity: -

Availability status: Obsolete

Introduction & key dates: 1965, first reported

EC Regulation 1107/2009 (repealing 91/414):
Status Not approved
Dossier rapporteur/co-rapporteur -
Date inclusion expires Expired
EU Candidate for substitution (CfS) -
Listed in EU database Yes

Approved for use () or known to be used () in the following European countries: Click to access a note on the approvals information on this site

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

Also used in: USA

Chemical structure: Click here for further information on the general chemical status information used on this site
Isomerism A chiral molecule existing in the R- and S-forms. The R-isomer is more biologically active than the S-isomer.
Chemical formula C10H15OPS2
Canonical SMILES CCOP(=S)(CC)SC1=CC=CC=C1
Isomeric SMILES No data
International Chemical Identifier key (InChIKey) KVGLBTYUCJYMND-UHFFFAOYSA-N
International Chemical Identifier (InChI) InChI=1S/C10H15OPS2/c1-3-11-12(13,4-2)14-10-8-6-5-7-9-10/h5-9H,3-4H2,1-2H3
Structure diagram/image available? Yes

General status: Click here for further information on the general chemical status information used on this site
Pesticide type Insecticide
Substance group Organophosphate
Minimum active substance purity >99.5%
Known relevant impurities -
Substance origin Synthetic
Mode of action Cholinesterase inhibitor. Non-systemic with contact and stomach action.
CAS RN 944-22-9
Alternative/old CAS RN 66767-39-3; 62705-71-9; 62680-03-9
EC number 213-408-0
CIPAC number 306
US EPA chemical code 041701
PubChem CID 13676
Molecular mass (g mol-1) 246.3
PIN (Preferred Identification Name) -
IUPAC name (RS)-O-ethyl S-phenyl ethylphosphonodithioate
CAS name O-ethyl S-phenyl ethylphosphonodithioate
Other status information Potential groundwater contaminant; Severe Marine Pollutant
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 Delia antiqua
Diabrotica undecimpunctata
Sedes nigromaculis
Diabrotica virgifera
Physical state Clear colourless to yellow coloured liquid
Related substances & organisms -

Formulations:
Property Click here for information on the general product and branding information used on this site Value
Example manufacturers & suppliers of products using this active now or historically
  • Stauffer Chemical Co.
  • Zeneca
Example products using this active
  • Capfos
  • Edge
  • Tenax
  • Tycap
  • Dyfonate
UK LERAP status No UK approval for use as a pesticide under EC Regulation 1107/2009
Formulation and application details Available in a wide variety of different formulations including granules, suspension concentrates and seed treatments.


ENVIRONMENTAL FATE

for fonofos

Property Click here for information on the parameters used to describe environmental fate on this site Value Source/Quality Score/Other Information Click here for information on the primary data sources used to populate this database with fate data Interpretation Click here for information on the way in which we interpret environmental fate data
Solubility - In water at 20oC (mg l-1) 13 K4 Low
Solubility - In organic solvents at 20oC (mg l-1) Miscible L3 - Acetone -
Miscible L3 - Ethanol -
Miscible L3 - Xylene -
Miscible L3 - Kerosene -
Melting point (oC) Not applicable Q3 -
Boiling point (oC) 130 L3 -
Degradation point (oC) - - -
Flashpoint (oC) - - -
Octanol-water partition coefficient at pH 7, 20oC P 7.94 X 1003 Calculated -
Log P 3.9 G4 High
Bulk density (g ml-1)/Specific gravity 1.17 Q2 -
Dissociation constant (pKa) at 25oC - - -
Note:
Vapour pressure at 20oC (mPa) 27 K4 Highly volatile
Henry's law constant at 25oC (Pa m3 mol-1) 6.56 X 10-01 H4 Moderately volatile
GUS leaching potential index Click here for a note on the limitations of the GUS index 2.12 Calculated Transition state
SCI-GROW groundwater index (μg l-1) for a 1 kg ha-1 or 1 l ha-1 application rate Click here for a note on the limitations of the SCI-GROW index Value 9.61 X 10-02 Calculated -
Note -
Potential for particle bound transport index Click here for a note on the limitations of the potential for particle bound transport index - Calculated Medium
Maximum UV-vis absorption L mol-1 cm-1 - - -
Surface tension (mN m-1) - - -

Degradation:
Property Click here for information on the parameters used to describe substance degradation Value Source/Quality Score/Other Information Click here for information on the primary data sources used to populate this database with degradation data Interpretation Click here for information on the way in which we interpret substance degradation data
General biodegradability -
Soil degradation (days) (aerobic) DT50 (typical) 99 K4 Moderately persistent
DT50 (lab at 20oC) 99 K4 Moderately persistent
DT50 (field) 40 F3 Moderately persistent
DT90 (lab at 20oC) - - -
DT90 (field) - - -
DT50 modelling endpoint - - -
Note General literature DT50 range 48-150 days (R2)
Dissipation rate RL50 on plant matrix Value - - -
Note -
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 38 K3 Moderately persistent
Note -
Water-sediment DT50 (days) - - -
Water phase only DT50 (days) - - -

Soil adsorption and mobility:
Property Click here for information on the parameters used to describe substance adsorption and mobility Value Source/Quality Score/Other Information Click here for information on the primary data sources used to populate this database with adsorption and mobility data Interpretation Click here for information on the way in which we interpret substance adsorption and mobility
Linear Kd - G3 Slightly mobile
Koc 870
Notes and range -
Freundlich Kf - - -
Kfoc -
1/n -
Notes and range -
pH sensitivity -


ECOTOXICOLOGY

for fonofos

Property Click here for information on the parameters used to describe substance ecotoxicology Value Source/Quality Score/Other Information Click here for information on the primary data sources used to populate this database with ecotoxicology data Interpretation Click here for information on the way in which we interpret substance ecotoxicology
Bio-concentration factor BCF (l kg-1) 300 Q2 Estimated Threshold for concern
CT50 (days) Not available -
Mammals - Acute oral LD50 (mg kg-1) 6.8 G4 Rat High
Mammals - Short term dietary NOEL (mg kg-1) - - -
(ppm diet) - -
Birds - Acute LD50 (mg kg-1) 128 G4 Anas platyrhynchos Moderate
Birds - Short term dietary (LC50/LD50) - - -
Fish - Acute 96 hour LC50 (mg l-1) 0.028 G4 Lepomis macrochirus High
Fish - Chronic 21 day NOEC (mg l-1) - - -
Aquatic invertebrates - Acute 48 hour EC50 (mg l-1) 0.0023 F3 Daphnia magna High
Aquatic invertebrates - Chronic 21 day NOEC (mg l-1) 0.00008 Q2 Daphnia magna High
Aquatic crustaceans - Acute 96 hour LC50 (mg l-1) 0.00041 F3 Americamysis bahia High
Sediment dwelling organisms - Acute 96 hour LC50 (mg l-1) 0.039 F3 Chironomus riparius, 2 day High
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) 1.5 K2 Unknown species Moderate
Algae - Chronic 96 hour NOEC, growth (mg l-1) 0.5 Q2 Unknown species Moderate
Honeybees Contact acute 48 hour LD50 (μg bee-1) > 3.3 K4 Moderate
Oral acute 48 hour LD50 (μg bee-1) - - -
Unknown mode acute 48 hour LD50 (μg bee-1) 0.0087 L3 High
Earthworms - Acute 14 day LC50 (mg kg-1) 218 K4 Moderate
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 - - -
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 fonofos

General:
Property Click here for information on the parameters used to describe human health and protection issues Value Source/Quality Score/Other Information Click here for information on the primary data sources used to populate this database with human health and protection data Interpretation Click here for information on the way in which we interpret human health and protection data
Threshold of Toxicological Concern (Cramer Class) Click here for a note on the limitations of the Cramer class High (class III) - -
Mammals - Acute oral LD50 (mg kg-1) 6.8 G4 Rat High
Mammals - Dermal LD50 (mg kg-1 body weight) 147 L3 Rat -
Mammals - Inhalation LC50 (mg l-1) - - -
Other Mammal toxicity endpoints - -
ADI - Acceptable Daily Intake (mg kg-1bw day-1) - - -
ARfD - Acute Reference Dose (mg kg-1bw day-1) 0.002 G3 -
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 List I; List II - -
Exposure Limits - - -
Exposure Routes Public -
Occupational May be absorbed through the skin
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

-

Respiratory tract irritant Skin irritant Skin sensitiser Eye irritant Phototoxicant

-

-

-

General human health issues Highly toxic
Ingestion may cause nausea, abdominal cramps, and diarrhea

: Yes, known to cause a problem
: No, known not to cause a problem
: Possibly, status not identified
- : No data found

Handling issues:
Property Click here for information on the parameters used to describe substance handling issues Value Source/Quality Score/Other Information Click here for information on the primary data sources used to populate this database with data on handling issues Interpretation Click here for information on the way in which we interpret data on handling issues
General Click here for a description of the International Maritime Dangerous Goods (IMDG) codes No information available
CLP classification 2013 Health: H300, H310
Environment: H400, H410
EC Risk Classification Click here to view information omn the EU risk phrases T+ - Very toxic: R27/28
N - Dangerous for the environment: R50, R53
EC Safety Classification Click here to view information omn the EU safety phrases S1/2, S26, S36/37, S45, S60, S61
WHO Classification Ia - Extremely hazardous
US EPA Classification (formulation) I - Danger - Highly toxic
UN Number -
Waste disposal & packaging Click here for a description of UN packaging marks -


TRANSLATIONS

for fonofos

Language Name
English fonofos
French fonofos
German Fonofos
Danish fonofos
Italian fonofos
Spanish fonofos
Greek fonofos
Slovenian fonofos
Polish fonofos
Swedish fonofos
Hungarian fonofos
Dutch fonofos

Record last updated: Wednesday 23 May 2018
Contact: aeru@herts.ac.uk