Difenzoquat (Ref: BAS 450H)
Last updated: 02/11/2023
(Not known by any other names)
Difenzoquat is a post-emergence herbicide. Little data is available regarding its environmental fate. It has a low avian toxicity but appears to be more toxic to aquatic species. it is moderately toxic to mammals if ingested and is thought to be an eye irritant.
The following alerts are based on the data in the tables below. An absence of an alert does not imply the substance has no implications for human health, biodiversity or the environment but just that we do not have the data to form a judgement.
Environmental fate
Ecotoxicity
Human health
A post-emergence quarternary ammonium herbicide for wild oat control
Wild oats
Alfalfa; Cereals including wheat, barley
-
Current
1975, USA
Not approved
Expired
No UK approval for use
EC Regulation 1107/2009 (repealing 91/414)
Not approved
Not applicable
Expired
-
Yes
ATAustria
BEBelgium
BGBulgaria
CYCyprus
CZCzech Republic
DEGermany
DKDenmark
EEEstonia
ELGreece
 
 
 
 
 
 
 
 
 
ESSpain
FIFinland
FRFrance
HRCroatia
HUHungary
IEIreland
ITItaly
LTLithuania
LULuxembourg
 
 
 
 
 
 
 
 
 
LVLatvia
MTMalta
NLNetherlands
PLPoland
PTPortugal
RORomania
SESweden
SISlovenia
SKSlovakia
 
 
 
 
 
 
 
 
 
ISIceland
NONorway
 
 
 
 
 
 
 
 
 
None
C₁₇H₁₇N₂
CN1C(=CC(=[N+]1C)C2=CC=CC=C2)C3=CC=CC=C3
No data
LBGPXIPGGRQBJW-UHFFFAOYSA-N
InChI=1S/C17H17N2/c1-18-16(14-9-5-3-6-10-14)13-17(19(18)2)15-11-7-4-8-12-15/h3-13H,1-2H3/q+1
Yes
Herbicide, Fungicide
Phenylpyrazole herbicide; Quarternary ammonium compound; Pyrazole herbicide
-
-
Synthetic
Selective, absorbed by foliage. Acts via the rapid destruction of cell membranes.
49866-87-7
256-505-3
367
106402
39425
No data found
249.33
1,2-dimethyl-3,5-diphenyl-1H-pyrazol-2-ium
1,2-dimethyl-3,5-diphenylpyrazolium
1,2-dimethyl-3,5-diphenyl-1H-pyrazolium
-
-
Z
0
Not applicable
Not known
-
Colourless, odourless crystals
Amvac Chemical Corp BASF King Tech
Usually supplied as a water miscible liquid
-
-
-
-
-
-
155
-
Decomposes before boiling
-
160
-
-
-
-
5.13 X 1000
Calculated
-
0.710
Q3 Q = Miscellaneous data from online sources 3 = Unverified data of known source
Low
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Soil adsorption and mobility
-
-
-
-
-
166.1
R4 R = Peer reviewed scientific publications 4 = Verified data
Non-mobile
9702
1.386
Literature values: Kf range 29-664 mL g⁻¹, Kfoc range 1740-33200 mL g⁻¹, 1 /n range 1.23-1.59, soils=8
-
-
-
-
Cannot be calculated
-
-
-
-
-
-
-
-
-
-
-
-
-
-
None
Terrestrial ecotoxicology
470
Rat
Moderate
-
-
-
-
-
-
-
-
10338
Anas platyrhynchos
Low
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
76
Oncorhynchus mykiss
Moderate
-
-
-
2.6
Daphnia magna
Moderate
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
HUMAN HEALTH AND PROTECTION
High (class III)
-
-
470
Rat
Moderate
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
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-
-
-
-
-
-
-
EU MRL pesticide database 
-
-
-
-
-
-
-
-
-
-
Carcinogen
Endocrine disruptor
XNo, known not to cause a problem
A0 A = Chromosome aberration (EFSA database) 0 = No data
; B0 B = DNA damage/repair (EFSA database) 0 = No data
; C0 C = Gene mutation (EFSA database) 0 = No data
; D0 D = Genome mutation (EFSA database) 0 = No data
; E0 E = Unspecified genotoxicity type (miscellaneous data source) 0 = No data
No data found
Reproduction / development effects
Acetyl cholinesterase inhibitor
Neurotoxicant
XNo, known not to cause a problem
XNo, known not to cause a problem
XNo, known not to cause a problem
Respiratory tract irritant
Skin irritant
Skin sensitiser
No data found
XNo, known not to cause a problem
No data found
Eye irritant
Phototoxicant
 
✓Yes, known to cause a problem
No data found
 
Moderately toxic May cause irreversible eye damage
IMDG Transport Hazard Class 6.1
Health: H302 Environment: H400, H410
II (Moderately hazardous)
UN2588
Packaging Group II (moderate danger)
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difenzoquat
difenzoquat
Difenzoquat
difenzoquat
difenzoquat
difenzocuat
-
difenzokwat
-
-
-
-
Record last updated:
02/11/2023
Contact:
aeru@herts.ac.uk
Please cite as:
Lewis, K.A., Tzilivakis, J., Warner, D. and Green, A. (2016) An international database for pesticide risk assessments and management. Human and Ecological Risk Assessment: An International Journal , 22 (4), 1050-1064. DOI: 10.1080/10807039.2015.1133242