| thiazopyr (Ref: MON 13200) |
 |
Environmental Fate - Ecotoxicology - Human Health - A to Z Index - Home
GENERAL INFORMATION 
for thiazopyr
Description: A pre-emergence herbicide for annual grasses and some broad-leaved weeds
Example pests controlled: Barnyardgrass; Nutsedge; Canarygrass; Groundsel; Foxtail; Junglerice; Ragweed; London rocket; Shepherd's purse; Wild mustard
Example applications: Maize; Peanuts; Soybeans; Alfalfa
Efficacy & activity: -
Availability status: Current
Introduction & key dates: 1997, USA
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) | - |
| 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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Also used in: Australia
Chemical structure:
| Isomerism | - |
| Chemical formula | C16H17F5N2O2S |
| Canonical SMILES | CC(C)CC1=C(C(=NC(=C1C(=O)OC)C(F)F)C(F)(F)F)C2=NCCS2 |
| Isomeric SMILES | No data |
| International Chemical Identifier key (InChIKey) | YIJZJEYQBAAWRJ-UHFFFAOYSA-N |
| International Chemical Identifier (InChI) | InChI=1S/C16H17F5N2O2S/c1-7(2)6-8-9(15(24)25-3)11(13(17)18)23-12(16(19,20)21)10(8)14-22-4-5-26-14/h7,13H,4-6H2,1-3H3 |
| 2D structure diagram/image available? | Yes |
General status:
| Pesticide type | Herbicide | |
| Substance group | Pyridine | |
| Minimum active substance purity | - | |
| Known relevant impurities | - | |
| Substance origin | Synthetic | |
| Mode of action | Inhibits cell division. Microtubule assembly inhibition. | |
| CAS RN | 117718-60-2 | |
| EC number | - | |
| CIPAC number | 8330 | |
| US EPA chemical code | 129100 | |
| PubChem CID | 91776 | |
| Molecular mass (g mol-1) | 396.38 | |
| PIN (Preferred Identification Name) | methyl 2-(difluoromethyl)-5-(4,5-dihydro-1,3-thiazol-2-yl)-4-(2-methylpropyl)-6-(trifluoromethyl)pyridine-3-carboxylate | |
| IUPAC name | methyl 2-difluoromethyl-5-(4,5-dihydro-1,3-thiazol-2-yl)-4-isobutyl-6-trifluoromethylnicotinate | |
| CAS name | methyl 2-(difluoromethyl)-5-(4,5-dihydro-2-thiazolyl)-4-(2-methylpropyl)-6-(trifluoromethyl)-3-pyridinecarboxylate | |
| Other status information | - | |
| Relevant Environmental Water Quality Standards | - | |
| Herbicide Resistance Classification (HRAC) | K1 | |
| Herbicide Resistance Classification (WSSA) | 3 | |
| Insecticide Resistance Classification (IRAC) | Not applicable | |
| Fungicide Resistance Classification (FRAC) | Not applicable | |
| Examples of recorded resistance | - | |
| Physical state | Light tan 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 | - | |||
ENVIRONMENTAL FATE
for thiazopyr
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| Solubility - In water at 20oC (mg l-1) | 2.29 | F4 | Low | |
| Solubility - In organic solvents at 20oC (mg l-1) | 287000 | F4 - Methanol | - | |
| 30600 | F4 - Hexane | - | ||
| Melting point (oC) | 77.3 | F4 | - | |
| Boiling point (oC) | - | - | - | |
| Degradation point (oC) | - | - | - | |
| Flashpoint (oC) | - | - | - | |
| Octanol-water partition coefficient at pH 7, 20oC | P | 7.76 X 1003 | Calculated | - |
| Log P | 3.89 | F4 | High | |
| Bulk density (g ml-1)/Specific gravity | 1.37 | F4 | - | |
| Dissociation constant (pKa) at 25oC | - | - | - | |
| Note: | ||||
| Vapour pressure at 20oC (mPa) | 0.27 | L3 | Low volatility | |
| Henry's law constant at 25oC (Pa m3 mol-1) | 4.75 X 10-02 | V3 | Non-volatile | |
GUS leaching potential index  |
2.70 | Calculated | Transition state | |
| SCI-GROW groundwater index (μg l-1) for a 1 kg ha-1 or 1 l ha-1 application rate |
Value | 2.12 X 10-01 | Calculated | - |
| Note | - | |||
| Potential for particle bound transport index |
- | Calculated | Medium | |
| 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) | 64 | L3 | Moderately persistent |
| DT50 (lab at 20oC) | 85 | F3 | Moderately persistent | |
| DT50 (field) | 274 | F3 | Persistent | |
| DT90 (lab at 20oC) | - | - | - | |
| DT90 (field) | - | - | - | |
| DT50 modelling endpoint | - | - | - | |
| Note | Best available data, US EPA gives field DT50 of 111-437 days | |||
| 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 | 7.8 | F3 | Moderately fast |
| Note | Data for pH5 | |||
| Aqueous hydrolysis DT50 (days) at 20oC and pH 7 | Value | Stable | F4 | - |
| Note | Stable at all relevant pH's | |||
| Water-sediment DT50 (days) | - | - | - | |
| Water phase only DT50 (days) | - | - | - | |
Soil adsorption and mobility:
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| Linear | Kd | - | F3 | Moderately mobile |
| Koc | 400 | |||
| Notes and range | Best available data | |||
| 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 |
| 2-(difluoromethyl)-5-(4,5-dihydro-2-thiazolyl)-4-(2-methyl-propyl)-6-(trifluorom ethyl)-3-pyridinecarboxylic acid | - | Soil (Aerobic) | - | - |
| 5-cyano-2-(difluoromethyl)-4-(2-methylpropyl)-6-(trifluoro-methyl)-3-pyridinecar boxylic acid | - | Soil (Aerobic) | - | - |
| 5-(aminocarbonyl)-2-(difluoromethyl)-4-(2-methyl propyl)-6-(trifluoromethyl)-3-pyridinecarboxylic acid | - | Soil (Aerobic) | - | - |
| methyl 5-cyano-2-(difluoromethyl)-4-(2-methyl propyl)-6-(trifuloromethyl)-3-pyridinecarboxylate | - | Soil (Aerobic) | - | - |
| Property |
Value | Source/Quality Score/Other Information |
Interpretation |
|
| Bio-concentration factor | BCF (l kg-1) | - | - | - |
| CT50 (days) | - | - | ||
| Mammals - Acute oral LD50 (mg kg-1) | > 5000 | F4 Rat | Low | |
| Mammals - Short term dietary NOEL | (mg kg-1) | 0.36 | L2 Rat, 2 year | High |
| (ppm diet) | - | - | ||
| Birds - Acute LD50 (mg kg-1) | 1814 | F4 Colinus virginianus | Moderate | |
| Birds - Short term dietary (LC50/LD50) | - | - | - | |
| Fish - Acute 96 hour LC50 (mg l-1) | 3.4 | F4 Oncorhynchus mykiss | Moderate | |
| Fish - Chronic 21 day NOEC (mg l-1) | 0.092 | L3 Pimephales promelas | Moderate | |
| Aquatic invertebrates - Acute 48 hour EC50 (mg l-1) | 6.1 | J4 Daphnia magna | Moderate | |
| Aquatic invertebrates - Chronic 21 day NOEC (mg l-1) | 0.11 | F4 Daphnia magna | Moderate | |
| Aquatic crustaceans - Acute 96 hour LC50 (mg l-1) | 1.5 | 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) | 0.035 | L3 Lemna gibba | Moderate | |
| Non-target plants | - | - | - | |
| - | - | - | ||
| Algae - Acute 72 hour EC50, growth (mg l-1) | 0.04 | L3 Raphidocelis subcapitata | Moderate | |
| 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) | => 100 | F4 | Moderate | |
| Earthworms - Acute 14 day LC50 (mg kg-1) | 1000 | L3 | 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 thiazopyr
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) | > 5000 | F4 Rat | Low | |
| Mammals - Dermal LD50 (mg kg-1 body weight) | > 5000 | F4 Rat | - | |
| Mammals - Inhalation LC50 (mg l-1) | > 1.2 | F4 Rat | - | |
| Other Mammal toxicity endpoints | - | - | ||
| ADI - Acceptable Daily Intake (mg kg-1bw day-1) | - | - | - | |
| 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 | List II | - | - | |
| 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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| General human health issues | Kidney, liver, thyroid and blood toxicant USEPA - some evidence to suggest possible human carcinogen |
|||||||
: 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 | None allocated at this time | |||
| EC Risk Classification |
Xi - Irritant; R36/37/38 N - Dangerous for the environment: R50 |
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| EC Safety Classification |
- | |||
| WHO Classification | NL | - | Not listed | |
| US EPA Classification (formulation) | III | - | Caution - Slightly toxic | |
| UN Number | - | |||
| Waste disposal & packaging |
- | |||
| Language | Name |
| English | thiazopyr |
| French | thiazopyr |
| German | Thiazopyr |
| Danish | thiazopyr |
| Italian | tiazopir |
| Spanish | tiazopir |
| Greek | - |
| Slovenian | tiazopir |
| Polish | tiazopyr |
| Swedish | - |
| Hungarian | - |
| Dutch | - |
Record last updated: Friday 25 May 2018
Contact: aeru@herts.ac.uk