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difenzoquat metilsulfate (Ref: AC 84777)
** difenzoquat methyl sulphate ** difenzoquat methyl sulfate ** CL84777 ** BAS 450H ** difenzoquat metilsulphate ** 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 difenzoquat metilsulfate

Description: A post-emergence quarternary ammonium herbicide for wild oat control

Example pests controlled: Wild oats; Powdery mildew

Example applications: Cereals including wheat, barley; Alfalfa; Maize; Clover seed crops

Efficacy & activity: -

Availability status: Current

Introduction & key dates: 1982, 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) Not applicable
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 C18H20N2O4S
Canonical SMILES CN1C(=CC(=[N+]1C)C2=CC=CC=C2)C3=CC=CC=C3.COS(=O)(=O)[O-]
Isomeric SMILES No data
International Chemical Identifier key (InChIKey) XQEMNBNCQVQXMO-UHFFFAOYSA-M
International Chemical Identifier (InChI) InChI=1S/C17H17N2.CH4O4S/c1-18-16(14-9-5-3-6-10-14)13-17(19(18)2)15-11-7-4-8-12-15;1-5-6(2,3)4/h3-13H,1-2H3;1H3,(H,2,3,4)/q+1;/p-1
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, Fungicide
Substance group Pyrazolium
Minimum active substance purity >96%
Known relevant impurities -
Substance origin Synthetic
Mode of action Selective, absorbed by foliage. Acts via the rapid destruction of cell membranes.
CAS RN 43222-48-6
EC number 256-152-5
CIPAC number -
US EPA chemical code 106401
PubChem CID 39424
Molecular mass (g mol-1) 360.43
PIN (Preferred Identification Name) 1,2-dimethyl-3,5-diphenyl-1H-pyrazol-2-ium methyl sulfate
IUPAC name 1,2-dimethyl-3,5-diphenyl-1H-pyrazolium methyl sulfate
CAS name 1,2-dimethyl-3,5-diphenylpyrazolium methyl sulfate
Other status information -
Relevant Environmental Water Quality Standards -
Herbicide Resistance Classification (HRAC) Z
Herbicide Resistance Classification (WSSA) -
Insecticide Resistance Classification (IRAC) Not applicable
Fungicide Resistance Classification (FRAC) Not known
Examples of recorded resistance -
Physical state Colourless 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
  • Amvac Chemical Corp
  • BASF
  • King Tech
  • American Cyanamid
Example products using this active
  • Finaven
  • Yeh-Yan-Ku
  • Avenge
UK LERAP status No UK approval for use as a pesticide under EC Regulation 1107/2009
Formulation and application details Usually supplied as a water miscible liquid or soluble powder.


ENVIRONMENTAL FATE

for difenzoquat metilsulfate

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) 765000 L3 High
Solubility - In organic solvents at 20oC (mg l-1) 360000 L3 - Dichloromethane -
500000 L3 - Chloroform -
558000 L3 - Methanol -
9800 L3 - Acetone -
Melting point (oC) 157 L3 -
Boiling point (oC) - - -
Degradation point (oC) - - -
Flashpoint (oC) 82 L3 - (open cup) -
Octanol-water partition coefficient at pH 7, 20oC P 2.45 X 10-01 Calculated -
Log P -0.61 T4 Low
Bulk density (g ml-1)/Specific gravity 0.8 L3 -
Dissociation constant (pKa) at 25oC 7 L3 -
Note: Weak acid
Vapour pressure at 20oC (mPa) 0.01 H4 Low volatility
Henry's law constant at 25oC (Pa m3 mol-1) 5.70 X 10-11 H4 Non-volatile
GUS leaching potential index Click here for a note on the limitations of the GUS index 0.03 Calculated Low 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 5.31 X 10-03 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 High
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) 90 L3 Moderately persistent
DT50 (lab at 20oC) 100 DW4 Persistent
DT50 (field) - - -
DT90 (lab at 20oC) - - -
DT90 (field) - - -
DT50 modelling endpoint - - -
Note Other sources: DT50 3 months (R3)
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 Stable W4 -
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 - L3 Non-mobile
Koc 30000
Notes and range Other sources: Log Koc 4.49-5.80
Freundlich Kf 166 R3 (for difenzoquat) Non-mobile
Kfoc 9702
1/n 1.39
Notes and range Kf range 29-664 mL/g; Kfoc range 1740-33200 mL/g; 1/n range 1.05-1.54; Soils=9
pH sensitivity -


ECOTOXICOLOGY

for difenzoquat metilsulfate

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) 20 P4 Low potential
CT50 (days) Not available -
Mammals - Acute oral LD50 (mg kg-1) 373 L3 Rat Moderate
Mammals - Short term dietary NOEL (mg kg-1) - L2 Rat, 2 year -
(ppm diet) 500 -
Birds - Acute LD50 (mg kg-1) > 4640 L3 Colinus virginianus Low
Birds - Short term dietary (LC50/LD50) - - -
Fish - Acute 96 hour LC50 (mg l-1) 694 L3 Oncorhynchus mykiss Low
Fish - Chronic 21 day NOEC (mg l-1) - - -
Aquatic invertebrates - Acute 48 hour EC50 (mg l-1) 2.63 L3 Daphnia magna Moderate
Aquatic invertebrates - Chronic 21 day NOEC (mg l-1) - - -
Aquatic crustaceans - Acute 96 hour LC50 (mg l-1) - - -
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) 0.54 F1 Unknown species Moderate
Algae - Chronic 96 hour NOEC, growth (mg l-1) - - -
Honeybees Contact acute 48 hour LD50 (μg bee-1) 36 L3 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) > 400 Q3 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 Harmless AA2 Chrysoperla carnea -
% 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 difenzoquat metilsulfate

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) 373 L3 Rat Moderate
Mammals - Dermal LD50 (mg kg-1 body weight) > 3540 L3 Rabbit -
Mammals - Inhalation LC50 (mg l-1) 0.36 L3 Rat, 4 hr -
Other Mammal toxicity endpoints - -
ADI - Acceptable Daily Intake (mg kg-1bw day-1) 0.0005 JMPR 1970 -
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 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

-

-

Respiratory tract irritant Skin irritant Skin sensitiser Eye irritant Phototoxicant

-

-

-

General human health issues Moderately toxic
May cause irreversible eye damage

: 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 Hygroscopic
CLP classification 2013 Health: H302
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, R53
EC Safety Classification Click here to view information omn the EU safety phrases S2, S60, S61
WHO Classification II - Moderately hazardous
US EPA Classification (formulation) I - Danger - Highly toxic
UN Number 2588
Waste disposal & packaging Click here for a description of UN packaging marks -


TRANSLATIONS

for difenzoquat metilsulfate

Language Name
English difenzoquat metilsulfate
French -
German -
Danish -
Italian -
Spanish -
Greek -
Slovenian -
Polish -
Swedish -
Hungarian -
Dutch -

Record last updated: Thursday 31 May 2018
Contact: aeru@herts.ac.uk