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terbufos (Ref: AC 92100)
** sebuphos ** terbuphos ** Translations

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

GENERAL INFORMATION
for terbufos

Description: An insecticide and nematicide used to control soil and other pests

Example pests controlled: Wireworms; Maggots; Rootworm larvae; White grubs; Black maize beetles; Nematodes; Aphids

Example applications: Corn; Sugarbeet; Sorghum; Sunflower; Citrus; Potatoes; Peanuts

Availability status: Current

Introduction & key dates: 1974

EC Regulation 1107/2009 (repealing 91/414):
Status Not approved
Dossier rapporteur/co-rapporteur Not applicable
Date inclusion expires Expired

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

Also used in: Australia, USA

General status:
Pesticide type Insecticide, Nematicide
Substance group Organophosphate
Minimum active substance purity -
Known relevant impurities -
Substance origin Synthetic
Mode of action Systemic. Cholinesterase inhibitor.
CAS RN 13071-79-9
EC number 235-963-8
CIPAC number 459
US EPA chemical code 105001
Chiral molecule No
Chemical formula C9H21O2PS3
SMILES S=P(OCC)(SCSC(C)(C)C)OCC
International Chemical Identifier key (InChIKey) XLNZEKHULJKQBA-UHFFFAOYSA-N
International Chemical Identifier (InChI) InChI=1S/C9H21O2PS3/c1-6-10-12(13,11-7-2)15-8-14-9(3,4)5/h6-8H2,1-5H3
Structure diagram/image available? Yes
Molecular mass (g mol-1) 288.4
PIN (Preferred Identification Name) S-[(tert-butylsulfanyl)methyl] O,O-diethyl phosphorodithioate
IUPAC name S-tert-butylthiomethyl O,O-diethyl phosphorodithioate
CAS name S-[[(1,1-dimethylethyl)thio]methyl] O,O-diethyl phosphorodithioate
Other status information Severe Marine Pollutant; Chemical subject to PIC regulations
Herbicide Resistance Classification (HRAC) Not applicable
Herbicide Resistance Classification (WSSA) Not applicable
Insecticide Resistance Classification (IRAC) 1B
Fungicide Resistance Classification (FRAC) Not applicable
Examples of recorded resistance Diabrotica undecimpunctata
Schizaphis graminum
Physical state Pale yellow liquid
Related substances & organisms -

Formulations:
Property Value
Example manufacturers & suppliers of products using this active now or historically
  • Amvac
  • BASF
  • American Cyanamid
Example products using this active
  • Counter
  • Contraven
UK LERAP status No UK approval for use or outside scope
Formulation and application details Usually formulated as granules.


ENVIRONMENTAL FATE

for terbufos

Property Value Source/Quality Score/Other Information Interpretation
Solubility - In water at 20oC (mg l-1) 4.5 K4 Low
Solubility - In organic solvents at 20oC (mg l-1) 300000 L2 - Acetone -
Melting point (oC) -29.2 L3 -
Boiling point (oC) - - -
Degradation point (oC) - - -
Flashpoint (oC) 88 L3 - (open cup) -
Octanol-water partition coefficient at pH 7, 20oC P 3.24 X 1004 Calculated -
Log P 4.51 G4 High
Bulk density (g ml-1)/Specific gravity 1.11 L3 -
Dissociation constant (pKa) at 25oC - - -
Note:
Vapour pressure at 25oC (mPa) 34.6 G4 Volatile
Henry's law constant at 25oC (Pa m3 mol-1) 2.70 H4 Moderately volatile
Henry's law constant at 20oC (dimensionless) 1.09 X 10-03 K3 Volatile
GUS leaching potential index 0.81 Calculated Low leachability
SCI-GROW groundwater index (μg l-1) for a 1 kg ha-1 or 1 l ha-1 application rate Value 3.73 X 10-03 Calculated -
Note -
Potential for particle bound transport index - Calculated Low
Maximum UV-vis absorption L mol-1 cm-1 - - -
Surface tension (mN m-1) - - -

Degradation:
Property Value Source/Quality Score/Other Information Interpretation
Soil degradation (days) (aerobic) DT50 (typical) 8 K4 Non-persistent
DT50 (lab at 20oC) 5 H4 Non-persistent
DT50 (field) 12 H4 Non-persistent
DT90 (lab at 20oC) - - -
DT90 (field) - - -
Note Best available data
Foliar DT50 (days) Value 3 A4 -
Note -
Aqueous photolysis DT50 (days) at pH 7 Value 4.5 K4 Moderately fast
Note -
Aqueous hydrolysis DT50 (days) at 20oC and pH 7 Value 6.5 K4 Non-persistent
Note Not sensitive to pH
Water-sediment DT50 (days) - - -
Water phase only DT50 (days) - - -

Soil adsorption and mobility:
Property Value Source/Quality Score/Other Information Interpretation
Linear Kd - G3 Slightly mobile
Koc 500
Notes and range -
Freundlich Kf 24.4 R3 Slightly mobile
Kfoc 700
1/n 1.09
Notes and range Soil characteristics - New Zealand Tokomaru soil with OC 3.2%
pH sensitivity -

Other known metabolites:
Metabolite name and reference Aliases Formation medium / Rate Estimated maximum occurrence fraction Metabolising enzymes
terbufos sulfoxide - Soil; Plant; Animal - -
terbufos sulfone - Soil; Plant; Animal - -
terbufos oxon sulfoxide - a = Soil; b= Plant; c = Animal a=0.05 -
terbufos oxon sulfone - Plant - -
terbufos oxon - Animal - -
O,O-diethyl phosphorothioate - Rats (Urinary) - -
diethyl phosphate - Rats (Urinary) - -
O,O-diethyl phosphorodithioate - Rats (Urinary) - -


ECOTOXICOLOGY

for terbufos

Property Value Source/Quality Score/Other Information Interpretation
Bio-concentration factor BCF (l kg-1) 286 F4 Threshold for concern
CT50 (days) Not available -
Mammals - Acute oral LD50 (mg kg-1) 1.3 G4 Rat High
Mammals - Short term dietary NOEL (mg kg-1) - L2 Rat, 2 year -
(ppm diet) 1 -
Birds - Acute LD50 (mg kg-1) 185 L3 Anas platyrhynchos Moderate
Birds - Short term dietary (LC50/LD50) - - -
Fish - Acute 96 hour LC50 (mg l-1) 0.004 L3 Lepomis macrochirus High
Fish - Chronic 21 day NOEC (mg l-1) - - -
Aquatic invertebrates - Acute 48 hour EC50 (mg l-1) 0.00031 K3 Daphnia magna High
Aquatic invertebrates - Chronic 21 day NOEC (mg l-1) - - -
Aquatic crustaceans - Acute 96 hour LC50 (mg l-1) 0.00022 F3 Americamysis bahia High
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) 1.4 K3 Unknown species Moderate
Algae - Chronic 96 hour NOEC, growth (mg l-1) - - -
Honeybees Contact acute 48 hour LD50 (μg bee-1) 4.1 F4 Moderate
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) 4 Q3 High
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 terbufos

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) 1.3 G4 Rat High
Mammals - Dermal LD50 (mg kg-1 body weight) 1.0 L3 Rabbit -
Mammals - Inhalation LC50 (mg l-1) 0.0061 L3 Rat -
Other Mammal toxicity endpoints - -
ADI - Acceptable Daily Intake (mg kg-1bw day-1) 0.0006 JMPR 2003 -
ARfD - Acute Reference Dose (mg kg-1bw day-1) 0.002 JMPR 2003 -
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 -
European MRLs Click here for the EU MRL pesticide database
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

: 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 No information available
CLP classification 2013 Health: H300, H310
Environment: H400, H410
EC Risk Classification T+ - Very toxic: R27/28
N - Dangerous for the environment: R50, R53
EC Safety Classification S1/2, S36/37, S45, S60, S61
WHO Classification Ia - Extremely hazardous
US EPA Classification (formulation) No consensus across products or no products available - -
UN Number 3018
Waste disposal & packaging -


TRANSLATIONS

for terbufos

Language Name
English terbufos
French terbuphos
German Terbufos
Danish terbufos
Italian terbufos
Spanish terbufos
Greek terbufos
Slovenian terbufos
Polish terbufos
Swedish -
Hungarian -
Dutch terbufos

Record last updated: Sunday 20 March 2016
Contact: aeru@herts.ac.uk