Norflurazon (Ref: H 52143)
Last updated: 23/01/2023
(Also known as: norflurazone; H 9789; monometflurazon)
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 pre-emergence herbicide used to control germinating weeds in various cropping, non-agricultural and industrial situations
Grasses; Sedges; Broad-leaved weeds
Fruit; Vegetables; Nuts; Cotton; Peanuts; Soybeans
-
Current
1968
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
C₁₂H₉ClF₃N₃O
CNC1=C(C(=O)N(N=C1)C2=CC=CC(=C2)C(F)(F)F)Cl
No data
NVGOPFQZYCNLDU-UHFFFAOYSA-N
InChI=1S/C12H9ClF3N3O/c1-17-9-6-18-19(11(20)10(9)13)8-4-2-3-7(5-8)12(14,15)16/h2-6,17H,1H3
Yes
Herbicide
Pyridazinone herbicide
-
-
Synthetic
Selective, absorbed by roots and translocated. Bleaching: inhibition of carotenoid biosynthesis.
27314-13-2
248-397-1
None allocated
105801
33775
No data found
303.7
-
4-chloro-5-methylamino-2-(α,α,α-trifluoro-m-tolyl)pyridazin-3(2H)-one
4-chloro-5-(methylamino)-2-(3-(trifluoromethyl)phenyl)-3(2H)-pyridazinone
Potential groundwater contaminant
-
F1
12
Not applicable
Not applicable
-
White to greyish-brown crystalline powder
Zorial Solicam Evital Predict
Available in a variety of formulations including wettable powders, flowable concentrates and granules
34
H4 H = The US ARS pesticide properties database. Dataset is no longer available. 4 = Verified data
Low
142000
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Ethanol
-
50000
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Acetone
-
2500
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Xylene
-
177
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
-
-
-
-
-
-
-
-
-
-
2.82 X 1002
Calculated
-
2.45
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Low
-
-
-
-
-
-
1.45
Q2 Q = Miscellaneous data from online sources 2 = Unverified data of unknown source
-
Not applicable
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
-
No dissociation
3.86 X 10-03
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Low volatility
3.50 X 10-05
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Non-volatile
-
-
-
-
-
-
-
90
W4 W = French database provided by ARVALIS-Institut du Végétal. Dataset no longer available. 4 = Verified data
Moderately persistent
-
-
-
225
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Persistent
-
-
-
-
-
-
-
-
-
Literature field studies DT₅₀ range 3-9 months USA
-
-
-
-
12.4
R4 R = Peer reviewed scientific publications 4 = Verified data
-
Published literature RL₅₀ range 9.0-15.9 days, 2 field crops, various matrices, n=2
-
-
-
-
-
-
-
-
-
-
-
-
-
-
Soil adsorption and mobility
-
W3 W = French database provided by ARVALIS-Institut du Végétal. Dataset no longer available. 3 = Unverified data of known source
Slightly mobile
700
-
10.7
R4 R = Peer reviewed scientific publications 4 = Verified data
Moderately mobile
295
1.303
Literature data: Kf range 0.35-93.02 mL g⁻¹, Kfoc range 42-578 mL g⁻¹, 1 /n range 0.87-1.64, Soils=17
-
3.60
Calculated
High leachability
7.68 X 10-01
Calculated
-
-
Medium
Calculated
-
Slightly mobile
Calculated
-
28
Whole fish
Low potential
Not available
-
Known groundwater metabolites
None
None
Terrestrial ecotoxicology
> 5000
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Rat
Low
19
L2 L = Pesticide manuals and hard copy reference books / other sources 2 = Unverified data of unknown source
Rat 2 year
High
-
-
-
-
-
> 2150
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Anas platyrhynchos
Low
-
-
-
-
-
-
1000
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Moderate
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
> 236
Apis mellifera
Low
-
-
-
235
L2 L = Pesticide manuals and hard copy reference books / other sources 2 = Unverified data of unknown source
Low
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
> 8.1
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Oncorhynchus mykiss
Moderate
-
-
-
> 15
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Daphnia magna
Moderate
1.0
P3 P = Other non-EU, UK or US Governments and Regulators 3 = Unverified data of known source
Daphnia magna
Moderate
> 2.29
Americamysis bahia
Moderate
-
-
-
-
-
-
-
-
-
0.086
Lemna gibba
Moderate
> 0.0176
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Raphidocelis subcapitata
Moderate
> 0.38
P4 P = Other non-EU, UK or US Governments and Regulators 4 = Verified data
Chlamydomonas reinhardtii
Moderate
-
-
-
-
-
-
HUMAN HEALTH AND PROTECTION
High (class III)
-
-
> 5000
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Rat
Low
5000
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
Rat
-
-
-
-
-
-
-
0.02
L3 L = Pesticide manuals and hard copy reference books / other sources 3 = Unverified data of known source
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
EU MRL pesticide database 
-
-
-
-
-
-
-
-
-
-
Carcinogen
Endocrine disruptor
?Possibly, status not identified
A3 A = Chromosome aberration (EFSA database) 3 = Negative
; 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
?Possibly, status not identified
XNo, known not to cause a problem
XNo, known not to cause a problem
Respiratory tract irritant
Skin irritant
Skin sensitiser
XNo, known not to cause a problem
✓Yes, known to cause a problem
XNo, known not to cause a problem
Eye irritant
Phototoxicant
 
✓Yes, known to cause a problem
No data found
 
Possible liver toxicant Harmful if swallowed USEPA - possible human carcinogen
No information available
Environment: H400, H410
U (Unlikely to present an acute hazard)
-
-
norflurazon
norflurazon
Norflurazon
norflurazon
norflurazon
norflurazona
-
norflurazon
-
-
-
-
Record last updated:
23/01/2023
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