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butachlor (Ref: CP 53619)
** amichlor ** CP 53619 ** rasayanchlor ** 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 butachlor

Description: A herbicide used for pre-emergence control of annual grasses and some broad-leaved weeds particularly in rice crops

Example pests controlled: Barnyardgrass; Crab grass; Torpedo grass; Witchgrass; Red deadnettle

Example applications: Rice; Wheat; Barley; Peanuts

Efficacy & activity: -

Availability status: Unknown

Introduction & key dates: circa 1970

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

Chemical structure: Click here for further information on the general chemical status information used on this site
Isomerism -
Chemical formula C17H26ClNO2
Canonical SMILES CCCCOCN(C1=C(C=CC=C1CC)CC)C(=O)CCl
Isomeric SMILES No data
International Chemical Identifier key (InChIKey) HKPHPIREJKHECO-UHFFFAOYSA-N
International Chemical Identifier (InChI) InChI=1S/C17H26ClNO2/c1-4-7-11-21-13-19(16(20)12-18)17-14(5-2)9-8-10-15(17)6-3/h8-10H,4-7,11-13H2,1-3H3
2D structure diagram/image available? Yes

General status: Click here for further information on the general chemical status information used on this site
Pesticide type Herbicide
Substance group Chloroacetamide
Minimum active substance purity -
Known relevant impurities -
Substance origin Synthetic
Mode of action Selective, systemic absorbed primarily via germinating shoots. Inhibition of VLCFA (inhibition of cell division)
CAS RN 23184-66-9
EC number 245-477-8
CIPAC number 354
US EPA chemical code 112301
PubChem CID 31677
Molecular mass (g mol-1) 311.9
PIN (Preferred Identification Name) N-(butoxymethyl)-2-chloro-N-(2,6-diethylphenyl)acetamide
IUPAC name N-butoxymethyl-2-chloro-2',6'-diethylacetanilide
CAS name N-(butoxymethyl)-2-chloro-N-(2,6-diethylphenyl)acetamide
Other status information -
Relevant Environmental Water Quality Standards -
Herbicide Resistance Classification (HRAC) K3
Herbicide Resistance Classification (WSSA) 15
Insecticide Resistance Classification (IRAC) Not applicable
Fungicide Resistance Classification (FRAC) Not applicable
Examples of recorded resistance -
Physical state Oily liquid of variable colour
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
  • Monsanto
  • FCC
  • King Tech Corp
  • Makhteshim-Agan
  • Pillar International
Example products using this active
  • Machete
  • Weedout
  • Butanox
  • Vendaval
UK LERAP status No UK approval for use as a pesticide under EC Regulation 1107/2009
Formulation and application details Usually supplied as an emulsifiable concentrate or as granules.


ENVIRONMENTAL FATE

for butachlor

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) 20 H4 Low
Solubility - In organic solvents at 20oC (mg l-1) - - -
Melting point (oC) -0.55 L3 -
Boiling point (oC) 156 L3 -
Degradation point (oC) 165 L3 -
Flashpoint (oC) Not expected to self ignite; Not highly flammable L3 -
Octanol-water partition coefficient at pH 7, 20oC P 3.16 X 1004 Calculated -
Log P 4.5 CA3 High
Bulk density (g ml-1)/Specific gravity 1.08 L3 -
Dissociation constant (pKa) at 25oC - - -
Note:
Vapour pressure at 20oC (mPa) 0.24 L3 Low volatility
Henry's law constant at 25oC (Pa m3 mol-1) 3.74 X 10-03 L3 Non-volatile
GUS leaching potential index Click here for a note on the limitations of the GUS index 2.02 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 8.11 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) 56 L3 Moderately persistent
DT50 (lab at 20oC) - - -
DT50 (field) 11.5 R4 Non-persistent
DT90 (lab at 20oC) - - -
DT90 (field) - - -
DT50 modelling endpoint - - -
Note General literature states DT50 4 days to 18 days (R4)
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 - - -
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 - H3 Slightly mobile
Koc 700
Notes and range Best available data
Freundlich Kf - - -
Kfoc -
1/n -
Notes and range -
pH sensitivity -


ECOTOXICOLOGY

for butachlor

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) 2.4 J4 (Other literature Log BCF range -1.5-0.8 (R3)) Low potential
CT50 (days) 1.7 -
Mammals - Acute oral LD50 (mg kg-1) 2000 L3 Rat Moderate
Mammals - Short term dietary NOEL (mg kg-1) - - -
(ppm diet) - -
Birds - Acute LD50 (mg kg-1) > 4640 L3 Anas platyrhynchos Low
Birds - Short term dietary (LC50/LD50) - - -
Fish - Acute 96 hour LC50 (mg l-1) > 0.44 L3 Lepomis macrochirus Moderate
Fish - Chronic 21 day NOEC (mg l-1) - - -
Aquatic invertebrates - Acute 48 hour EC50 (mg l-1) > 2.4 L3 Daphnia magna Moderate
Aquatic invertebrates - Chronic 21 day NOEC (mg l-1) - - -
Aquatic crustaceans - Acute 96 hour LC50 (mg l-1) > 0.19 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) > 0.2 F4 Scenedesmus quadricauda 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) > 100 L3 Low
Oral acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) > 100 L3 Low
Unknown mode acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1) - - -
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) 0.515 R4 Eisenia foetida 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 butachlor

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) 2000 L3 Rat Moderate
Mammals - Dermal LD50 (mg kg-1 body weight) > 13000 L3 Rat -
Mammals - Inhalation LC50 (mg l-1) 3.34 L3 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 - - -
Exposure Routes Public -
Occupational Occupational exposure may occur through dermal contact
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

A0; B0; C0; D0; E0

-

-

-

Respiratory tract irritant Skin irritant Skin sensitiser Eye irritant Phototoxicant

-

-

-

-

General human health issues USEPA - possible human carcinogen
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

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: H302, H317, H330
Environment: H400, H410
EC Risk Classification Click here to view information omn the EU risk phrases Xn - Harmful: R22
N - Dangerous for the environment: R50/53
EC Safety Classification Click here to view information omn the EU safety phrases S60, S61
WHO Classification III - Slightly hazardous
UN Number -
Waste disposal & packaging Click here for a description of UN packaging marks -


TRANSLATIONS

for butachlor

Language Name
English butachlor
French butachlore
German Butachlor
Danish butachlor
Italian butaclor
Spanish butaclor
Greek -
Slovenian butaklor
Polish butachlor
Swedish -
Hungarian -
Dutch butachloor

Record last updated: Tuesday 02 July 2019
Contact: aeru@herts.ac.uk