fenamiphos (Ref: BAY 68138) ** phenamiphos ** methaphenamiphos ** SRA 3886 ** Translations

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GENERAL INFORMATION
for fenamiphos

Description: An insecticide and nematicide used to control ecoparasitic, endoparasitic, free-living and cyst-forming nematodes

Introduction: 1967, first reported; 1968, first introduced

EC Regulation 1107/2009 (repealing 91/414):

Status	Approved
Dossier rapporteur/co-rapporteur	Netherlands
Date inclusion expires	31/07/2017

Approved for use () or known to be used () in the following European countries:

AT

BE

BG

CY

CZ

DE

DK

EE

EL

ES

FI

FR

HU

IE

IT

LT

LU

LV

MT

NL

PL

PT

RO

SE

SI

SK

UK

Also registered in: Australia, USA

General status:

Pesticide type	Nematicide
Substance group	Organophosphate
Substance origin	Synthetic
Mode of action	Systemic, conatct action, absorbed through roots
CAS RN	22224-92-6
EC number	244-848-1
CIPAC number	692
US EPA chemical code	100601
Chiral molecule	Chiral, a specific isomer or a derivative of a chiral molecule
Chemical formula	C13H22NO3PS
SMILES	O=P(OCC)(Oc1ccc(SC)c(c1)C)NC(C)C
International Chemical Identifier key (InChIKey)	ZCJPOPBZHLUFHF-UHFFFAOYSA-N
International Chemical Identifier (InChI)	InChI=1S/C13H22NO3PS/c1-6-16-18(15,14-10(2)3)17-12-7-8-13(19-5)11(4)9-12/h7-10H,6H2,1-5H3,(H,14,15)
Structure diagram/image available?	Yes
Molecular mass (g mol-1)	303.36
PIN (Preferred Identification Name)	(E)-[ethyl 3-methyl-4-(methylsulfanyl)phenyl propan-2-ylphosphoramidate]
IUPAC name	(RS)-(ethyl 4-methylthio-m-tolyl isopropylphosphoramidate)
CAS name	ethyl 3-methyl-4-(methylthio)phenyl (1-methylethyl)phosphoramidate
Other status information	Potential groundwater contaminant; Marine Pollutant
Herbicide Resistance Classification (HRAC)	Not applicable
Herbicide Resistance Classification (WSSA)	Not applicable
Insecticide Resistance Classification (IRAC)	1B
Fungicide Resistance Classification (FRAC)	Not applicable
Physical state	Colourless crystals to tan waxy solid depending on purity
Related substances & organisms	-

Formulations:

Property	Value
Example manufacturers & suppliers of products using this active	Bayer CropScience King Tech Corp AgroCare
Example products using this active	Nemacur CS 240
UK LERAP status	No UK approval for use or outside scope
Formulation and application details	Often supplied as a capsule suspension that is diluted with water and applied by drip irrigation or via a spray followed by incorporation into the soil.

ENVIRONMENTAL FATE
for fenamiphos

Property		Value	Source/Quality Score/Other Information	Interpretation
Solubility - In water at 20oC (mg l-1)		345	A5	Moderate
Solubility - In organic solvents at 20oC (mg l-1)		27000	A5 - n-Hexane	-
		250000	A5 - Acetone	-
		250000	A5 - Ethyl acetate	-
		250000	A5 - Dichloromethane	-
Melting point (oC)		46	A5	-
Boiling point (oC)		Decomposes before boiling	A5	-
Degradation point (oC)		200	A5	-
Flashpoint (oC)		Not expected to self ignite; Not highly flammable	A5	-
Octanol-water partition coefficient at pH 7, 20oC	P	2.00 X 1003	Calculated	-
	Log P	3.3	A4	High
Bulk density (g ml-1)/Specific gravity		1.19	A5	-
Dissociation constant (pKa) at 25oC		Not applicable	A5	-
		Note: No dissociation
Vapour pressure at 25oC (mPa)		0.12	A5	Non-volatile
Henry's law constant at 25oC (Pa m3 mol-1)		9.90 X 10-05	A5	Non-volatile
Henry's law constant at 20oC (dimensionless)		3.00 X 10-08	K3	Non-volatile
GUS leaching potential index		-0.11	Calculated	Low leachability
SCI-GROW groundwater index (μg l-1) for a 1 kg ha-1 or 1 l ha-1 application rate	Value	2.82 X 10-04	Calculated	-
	Note	-
Potential for particle bound transport index		-	Calculated	Low
Maximum UV-vis absorption L mol-1 cm-1		201nm = 24300, 251nm = 11400, 287nm = 1400	A5	-
Surface tension (mN m-1)		47.2	A5 at 20oC	-

Degradation:

Property		Value	Source/Quality Score/Other Information	Interpretation
Soil degradation (days) (aerobic)	DT50 (typical)	0.85	A5	Non-persistent
	DT50 (lab at 20oC)	0.85	A5	Non-persistent
	DT50 (field)	1.8	A5	Non-persistent
	DT90 (lab at 20oC)	2.95	A5	-
	DT90 (field)	-	-	-
	Note	EU dossier lab studies DT50 range 0.4-1.4 days, DT90 range 1.3-4.6 days; field studies DT50 range 1.5-2.2 days; Other sources: 50 days (DW3)
Aqueous photolysis DT50 (days) at pH 7	Value	0.2	A4	Fast
	Note	-
Aqueous hydrolysis DT50 (days) at 20oC and pH 7	Value	304	A5	Persistent
	Note	pH sensitive: 252 days at pH 5, 236 days at pH 9 all at 20 degC
Water-sediment DT50 (days)		60.2	A4	Moderately fast
Water phase only DT50 (days)		5.8	A4	Moderately fast

Soil adsorption and mobility:

Property		Value	Source/Quality Score/Other Information	Interpretation
Linear	Kd	-	DW3	Moderately mobile
	Koc	100
	Notes and range	-
Freundlich	Kf	1.03	A5	Moderately mobile
	Kfoc	266
	1/n	0.935
	Notes and range	EU dossier Kf range 0.70-1.37 mL/g, Kfoc range 148-469 mL/g, 1/n range 0.90-0.95, Soils=4
pH sensitivity		-

Key metabolites:

Metabolite		Formation medium	Estimated maximum occurrence fraction	91/414 relevancy
fenamiphos sulfoxide		Soil	0.791	Major fraction, Relevant
fenamiphos sulfone		Soil	0.228	Major fraction, Relevant

Other known metabolites:

Metabolite name and reference	Aliases	Formation medium / Rate	Estimated maximum occurrence fraction	Metabolising enzymes
3-methyl-4-[methylsulfonyl]phenol Note: Rat LD50 1250 mg kg-1 bw	fenamiphos sulfone phenol; fenamiphos metabolite M13	Soil (Aerobic)	-	-
-	fenamiphos sulfonic acid	Water (Photolysis)	-	-
4-hydroxy-2-methylbenzenesulfonic acid	fenamiphos phenol sulfonic acid; fenamiphos metabolite M24	Water (Photolysis); Rat	-	-
3-methyl-4-(methylthio)phenol	fenamiphos phenol; fenamiphos metabolite M11	Rat	-	-
ethyl 3-methyl-4-(methylthio)phosphoramidic acid phenyl ester	des-isopropyl fenamiphos; fenamiphos metabolite M06	unknown	-	-
Ethyl 3-methyl-4-(methylsulfinyl)phosphoric acid phenyl ester	des-isopropylamino fenamiphos sulfoxide; fenamiphos metabolite M09	unknown	-	-
3-methyl-4-[methylsulfinyl]phenol Note: DT50 soil = 30 days	fenamiphos sulfoxide phenol; fenamiphos metabolite M12	Soil (Aerobic); Water; Rat	0.25	-

ECOTOXICOLOGY
for fenamiphos

Property		Value	Source/Quality Score/Other Information	Interpretation
Bio-concentration factor	BCF	110	A5	Threshold for concern
	CT50 (days)	0.22		-
Bioaccumulation potential		-	Calculated	Moderate
Mammals - Acute oral LD50 (mg kg-1)		> 6	A5 Rat	High
Mammals - Short term dietary NOEL	(mg kg-1)	> 0.3	A5 Rat	High
	(ppm diet)	-		-
Birds - Acute LD50 (mg kg-1)		0.8	A5 Colinus virginianus	High
Birds - Short term dietary (LC50/LD50)		> 43 mg kg feed-1	A5 Colinus virginianus	-
Fish - Acute 96 hour LC50 (mg l-1)		0.0093	A5 Oncorhynchus mykiss	High
Fish - Chronic 21 day NOEC (mg l-1)		0.0038	A5 Oncorhynchus mykiss	-
Aquatic invertebrates - Acute 48 hour EC50 (mg l-1)		0.0019	L3 Daphnia magna	High
Aquatic invertebrates - Chronic 21 day NOEC (mg l-1)		0.01	A4 Daphnia magna	-
Aquatic crustaceans - Acute 96 hour LC50 (mg l-1)		0.0057	F3 Americamysis bahia	High
Sediment dwelling organisms - Acute 96 hour LC50 (mg l-1)		-	-	-
Sediment dwelling organisms - Chronic 28 day NOEC, static, water (mg l-1)		0.01	A4 Chironomus riparius, emergence	Moderate
Sediment dwelling organisms - Chronic 28 day NOEC, sediment (mg kg-1)		-	-	-
Aquatic plants - Acute 7 day EC50, biomass (mg l-1)		-	-	-
Algae - Acute 72 hour EC50, growth (mg l-1)		3.8	A5 Scenedemus subspicatus	Moderate
Algae - Chronic 96 hour NOEC, growth (mg l-1)		-	-	-
Honeybees	Contact acute 48 hour LD50 (μg bee-1)	0.28	A5	High
	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)		888	A5 Eisenia foetida	Moderate
Earthworms - Chronic 14 day NOEC, reproduction (mg kg-1)		0.49	A3 Eisenia foetida	Moderate
Other soil macro-organisms - e.g. Collembola	LR50 / EC50 / NOEC / % Effect	-	-	-
Other arthropod (1)	LR50 g ha-1	0.175	48 hour A5 Aphidius rhopalosiphi, adult	Harmful at 1 kg ha-1 Harmful at 0.1 kg ha-1 Harmful at 0.01 kg ha-1
	% Effect	-	-	-
Other arthropod (2)	LR50 g ha-1	1.7	7 day A5 Typhlodromus pyri, protonymph	Harmful at 1 kg ha-1 Harmful at 0.1 kg ha-1 Moderately harmful at 0.01 kg ha-1
	% Effect	-	-	-
Soil micro-organisms		Nitrogen mineralisation: >25% effect Carbon mineralisation: No significant adverse effect	A5 Dose: 133 mg kg-1 soil, 28 days	-
Mesocosm study data	NOEAEC mg l-1	0.0035	A5 Fish and aquatic invertebrates	-
	NOEAEC mg l-1	-	-	-

HUMAN HEALTH AND PROTECTION
for fenamiphos

General:

Property		Value	Source/Quality Score/Other Information	Interpretation
Mammals - Acute oral LD50 (mg kg-1)		> 6	A5 Rat	High
Mammals - Dermal LD50 (mg kg-1 body weight)		82	A5 Rat	-
Mammals - Inhalation LC50 (mg l-1)		0.072	A5 Rat	-
Other Mammal toxicity endpoints		-		-
ADI - Acceptable Daily Intake (mg kg-1bw day-1)		0.0008	A5 Dog, SF=100	-
ARfD - Acute Reference Dose (mg kg-1bw day-1)		0.0025	A5 Dog, SF=100	-
AOEL - Acceptable Operator Exposure Level - Systemic (mg kg-1bw day-1)		0.0008	A5 Dog, SF=100	-
Dermal penetration studies (%)		1.0-5.0	A5 concentration dependant	-
Dangerous Substances Directive 76/464		List I; List II	-	-
Exposure Limits		-	-	-
Exposure Routes	Public	Negligible risk to bystanders
	Occupational	Negligible risk to operators
Examples of European MRLs (mg kg-1)	Value	Sweet peppers: 0.1; Brussel sprouts, cabbages, cucumbers, melons (not watermelons), summer squash, eggplants, tomatoes and carrots: 0.05; Other vegetables, fruit and cereal grains: 0.02
	Note	Current May 2007. For the EU pesticides database click here
Drinking Water MAC (μg l-1)		-	-	-

Health issues:

Carcinogen	Mutagen	Endocrine disrupter	Reproduction / development effects	Cholinesterase inhibitor	Neurotoxicant	Respiratory tract irritant	Skin irritant	Eye irritant
		-	-			-
General human health issues		Toxic by inhalation and skin contact Exposure may be fatal due to respiratory failure

: Yes, known to cause a problem
: No, known not to cause a problem
: Possibly, status not identified
- : No data

Handling issues:

Property		Value	Source/Quality Score/Other Information	Interpretation
General		Not explosive or oxidising IMDG Transport Code is usually 6.1
CLP classification 2013		-
EC Risk Classification		T+ - Very toxic: R28 T - Toxic: R24 N - Dangerous for the environment: R50, R53
EC Safety Classification		S1/2, S23, S28, S36/37, S45, S60, S61
WHO Classification		Ib	-	Highly hazardous
US EPA Classification (formulation)		I	-	Danger - Highly toxic
UN Number		2783
Waste disposal & packaging		Packaging Group I (great danger)

TRANSLATIONS
for fenamiphos

Language	Name
English	fenamiphos
French	phenamiphos
German	Fenamiphos
Danish	fenamiphos
Italian	fenamifos
Spanish	fenamifos
Greek	fenamiphos
Slovenian	fenamifos
Polish	fenamifos
Swedish	-
Hungarian	-
Dutch	fenamifos

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Record last updated: Saturday 02 August 2014
Contact: aeru@herts.ac.uk