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GET ADDITIONAL DATA HERE!

atrazine (Ref: G 30027)
** aneldazin ** Translations

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

SUMMARY

Atrazine is a herbicide that does not have EU approval for use. It has selective, systemic action with residual and foliar activity. It has a low aqueous solubility, it is volatile and, based on its physico-chemical properties there is some concern that it could leach to groundwater. It is generally not persistent in the field nor in aquatic systems. It is moderately toxic to mammals, is not expected to bioaccumulate and is a skin, eye and respiratory system irritant. Atrazine is moderately toxic to most aquatic life, earthworms and honeybees but presents less of a risk to birds.

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

Description: A triazine herbicide used pre- and post-emergence with restricted permitted uses to control broad-leaved weeds and grasses

Example pests controlled: Morning glory; Barnyard grass; Cocklebur; Lambsquarters; Crabgrass; Pigweed; Buckwheat; Ragweed; Foxtail

Example applications: Corn; Sorghum; Sugarcane; Turf; Asparagus

Availability status: Current

Introduction & key dates: 1957

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

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: Australia, USA

General status: Click here for further information on the general chemical status information used on this site
Pesticide type Herbicide
Substance group Triazine
Minimum active substance purity -
Known relevant impurities -
Substance origin Synthetic
Mode of action Selective, systemic action with residual and foliar activity. Inhibits photosynthesis (photosystem II).
CAS RN 1912-24-9
EC number 217-617-8
CIPAC number 91
US EPA chemical code 080803
Chiral molecule No
Chemical formula C8H14ClN5
SMILES Clc1nc(nc(n1)NC(C)C)NCC
International Chemical Identifier key (InChIKey) MXWJVTOOROXGIU-UHFFFAOYSA-N
International Chemical Identifier (InChI) InChI=1S/C8H14ClN5/c1-4-10-7-12-6(9)13-8(14-7)11-5(2)3/h5H,4H2,1-3H3,(H2,10,11,12,13,14)
Structure diagram/image available? Yes
Molecular mass (g mol-1) 215.68
PIN (Preferred Identification Name) 6-chloro-N2-ethyl-N4-(propan-2-yl)-1,3,5-triazine-2,4-diamine
IUPAC name 6-chloro-N2-ethyl-N4-isopropyl-1,3,5-triazine-2,4-diamine
CAS name 6-chloro-N-ethyl-N'-(1-methylethyl)-1,3,5-triazine-2,4-diamine
Other status information OSPAR soc; WFD pps; Potential groundwater contaminant; Chemical subject to PIC regulations
Herbicide Resistance Classification (HRAC) C1
Herbicide Resistance Classification (WSSA) 5
Insecticide Resistance Classification (IRAC) Not applicable
Fungicide Resistance Classification (FRAC) Not applicable
Examples of recorded resistance Many recorded cases
Alopecurus myosuroides
Alopecurus myosuroides
Amaranthus retroflexus
Conyza canadensis
Abutilon theophrasti
Physical state White crystals
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
  • Syngenta
  • Bayer CropScience
  • Monsanto
  • Scotts
Example products using this active
  • Gesaprim
  • Fenamin
  • Atrazinax
  • Weedex
  • Primaze
  • Atratol
  • Radazine
UK LERAP status Buffer probably required in UK - see product label
Formulation and application details Available in a variety of formulations including dry flowable, flowable liquid, liquid, water dispersible granules and wettable powders.


ENVIRONMENTAL FATE

for atrazine

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) 35 B5 Low
Solubility - In organic solvents at 20oC (mg l-1) 24000 F4 - Ethyl acetate -
28000 F4 - Dichloromethane -
4000 F4 - Toluene -
110 F4 - n-Hexane -
Melting point (oC) 175.8 F4 -
Boiling point (oC) Decomposes before boiling F4 -
Degradation point (oC) - - -
Flashpoint (oC) Not expected to self ignite; Not highly flammable F4 -
Octanol-water partition coefficient at pH 7, 20oC P 5.01 X 1002 Calculated -
Log P 2.7 B5 Moderate
Bulk density (g ml-1)/Specific gravity 1.23 F4 -
Dissociation constant (pKa) at 25oC 1.7 B5 -
Note: Very weak base
Vapour pressure at 25oC (mPa) 0.039 B5 Volatile
Henry's law constant at 25oC (Pa m3 mol-1) 1.50 X 10-04 L3 Non-volatile
Henry's law constant at 20oC (dimensionless) 1.20 X 10-07 K3 Non-volatile
GUS leaching potential index Click here for a note on the limitations of the GUS index 3.20 Calculated High leachability
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 4.09 X 10-01 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
Soil degradation (days) (aerobic) DT50 (typical) 75 B5 Laboratory Moderately persistent
DT50 (lab at 20oC) 66 B4 Moderately persistent
DT50 (field) 29 B4 Non-persistent
DT90 (lab at 20oC) - - -
DT90 (field) - - -
Note Lab studies DT50 range 28-150 days, field studies DT50 range 6-108 days (USA); Other sources: DT50 6-10 weeks (R3), 146 days at 25 DegC (R3)
Plant matrix DT50 (days) Value 5.0 A5 -
Note -
Aqueous photolysis DT50 (days) at pH 7 Value 2.6 B5 Moderately fast
Note -
Aqueous hydrolysis DT50 (days) at 20oC and pH 7 Value 86 K4 Moderately persistent
Note Rapidly hydrolysed in strong acids and alkalis and at elevated temperatures
Water-sediment DT50 (days) 80 K4 Moderately fast
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 Moderately mobile
Koc 100
Notes and range Other sources: 89-513 mL/g (R3), Log Koc 2.00 at 25 DegC (R4)
Freundlich Kf 3.2 R4 Moderately mobile
Kfoc 174
1/n 1.07
Notes and range Literature data: Kf range 1.3-6.3 mL/g, kfoc range 70-429 mL/g, 1/n range 1.04=1.10, Soils = 13
pH sensitivity -

Key metabolites:
Metabolite Formation medium Estimated maximum occurrence fraction 91/414 relevancy Click here for further information on 91/414 relevancy
6-deisopropyl atrazine (Ref: G-28279) This metabolite may cause environmental pollution, click here for further information Soil   0.33   Major, Relevant
deethylatrazine (Ref: G-30033) This metabolite may cause environmental pollution, click here for further information Soil   0.21   Major, Relevant
2-hydroxyatrazine (Ref: G-34048) Soil     Non Relevant

Other known metabolites:
Metabolite name and reference Aliases Formation medium / Rate Estimated maximum occurrence fraction Metabolising enzymes
deisopropyldeethylhydroxyatrazine
(Ref: G-17791)
- Soil 0.004 -
deisopropylhydroxyatrazine
(Ref: G-17792)
- Soil 0.08 -
deethylhydroxyatrazine
(Ref: G-17794)
- Soil 0.08 -
deisopropyldeethylatrazine
(Ref: G-28273)
- Soil 0.08 -


ECOTOXICOLOGY

for atrazine

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) 4.3 P4 (Other literature Log BCF range 0.98-2.5 (R3)) Low potential
CT50 (days) Not available -
Mammals - Acute oral LD50 (mg kg-1) 1869 B5 Rat Moderate
Mammals - Short term dietary NOEL (mg kg-1) - B3 Rat -
(ppm diet) 200 -
Birds - Acute LD50 (mg kg-1) 4237 B5 Coturnix japonica Low
Birds - Short term dietary (LC50/LD50) - - -
Fish - Acute 96 hour LC50 (mg l-1) 4.5 B5 Oncorhynchus mykiss Moderate
Fish - Chronic 21 day NOEC (mg l-1) 2 J4 Oncorhynchus mykiss Moderate
Aquatic invertebrates - Acute 48 hour EC50 (mg l-1) 85 B3 Daphnia magna Moderate
Aquatic invertebrates - Chronic 21 day NOEC (mg l-1) 0.25 F3 Daphnia magna, LOEC Moderate
Aquatic crustaceans - Acute 96 hour LC50 (mg l-1) 1.0 F4 Americamysis bahia Moderate
Sediment dwelling organisms - Acute 96 hour LC50 (mg l-1) 1.0 F3 Chironomus riparius, 1 day Moderate
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) 0.019 F3 Lemna gibba Moderate
Non-target plants - - -
- - -
Algae - Acute 72 hour EC50, growth (mg l-1) 0.059 B3 Raphidocelis subcapitata Moderate
Algae - Chronic 96 hour NOEC, growth (mg l-1) 0.1 F3 Green algae Moderate
Honeybees Contact acute 48 hour LD50 (μg bee-1) - - -
Oral acute 48 hour LD50 (μg bee-1) 100 b5 Moderate
Unknown mode acute 48 hour LD50 (μg bee-1) - - -
Earthworms - Acute 14 day LC50 (mg kg-1) 79 B5 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 Harmless AA2 Typhlodromus pyri -
Other arthropod (2) LR50 g ha-1 - - -
% Effect Harmless AA2 Chrysoperla carnea -
Soil micro-organisms - - -
Mesocosm study data NOEAEC mg l-1 - - -
NOEAEC mg l-1 - - -


HUMAN HEALTH AND PROTECTION

for atrazine

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) 1869 B5 Rat Moderate
Mammals - Dermal LD50 (mg kg-1 body weight) > 3100 L3 Rat -
Mammals - Inhalation LC50 (mg l-1) 5.8 L3 Rat -
Other Mammal toxicity endpoints - -
ADI - Acceptable Daily Intake (mg kg-1bw day-1) 0.02 JMPR 2007 -
ARfD - Acute Reference Dose (mg kg-1bw day-1) 0.1 JMPR 2007 -
AOEL - Acceptable Operator Exposure Level - Systemic (mg kg-1bw day-1) 0.01 BA5; EU 1998 -
Dermal penetration studies (%) 10 BA5; EU 1998 -
Dangerous Substances Directive 76/464 - - -
Exposure Limits - - -
Exposure Routes Public -
Occupational May be absorbed from the lungs or through intact skin
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 IARC Group 3 carcinogen
May cause coma, circulatory collapse and gastric bleeding
May cause renal failure
May disturb testosterone metabolism

: 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 Avoid the formation of dust
Powders may become explosive under certain conditions
Store away from heat, flames and sparks
CLP classification 2013 Health: H317, H373
Environment: H400, H410
EC Risk Classification Click here to view information omn the EU risk phrases Xn - Harmful: R48/22, R43
N - Dangerous for the environment: R50, R53
EC Safety Classification Click here to view information omn the EU safety phrases S2, S36/37, S61, S60
WHO Classification III - Slightly hazardous
US EPA Classification (formulation) III - Caution - Slightly toxic
UN Number -
Waste disposal & packaging Click here for a description of UN packaging marks -


TRANSLATIONS

for atrazine

Language Name
English atrazine
French atrazine
German Atrazin
Danish atrazin
Italian atrazina
Spanish atrazina
Greek atrazine
Slovenian atrazin
Polish atrazyna
Swedish -
Hungarian atrazine
Dutch atrazine

Record last updated: Wednesday 13 January 2016
Contact: aeru@herts.ac.uk