| Identification | More | [Name]
Edifenphos | [CAS]
17109-49-8 | [Synonyms]
EDDP
EDIFEN
EDIFENFOS
EDIFENPHOS
EDISAN
HINORABCIDE
HINOSAN
HINOSAN(R)
O-Ethyl-s，S-diphenyldithiophosphate
O-ETHYL S,S-DIPHENYL PHOSPHORODITHIOATE
VIHINO
BAY 78418
bay78418
BAYER 78418
bayer78418
Blastoff
Dithiophosphorsaeure-O-aethyl-S,S-diphenylester
Ediphenophos
Ediphenphos
Lutrol | [EINECS(EC#)]
241-178-1 | [Molecular Formula]
C14H15O2PS2 | [MDL Number]
MFCD00078673 | [Molecular Weight]
310.37 | [MOL File]
17109-49-8.mol |
| Safety Data | Back Directory | [Hazard Codes ]
T,N | [Risk Statements ]
R21:Harmful in contact with skin.
R23/25:Toxic by inhalation and if swallowed .
R43:May cause sensitization by skin contact.
R50/53:Very Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment . | [Safety Statements ]
S36/37:Wear suitable protective clothing and gloves .
S45:In case of accident or if you feel unwell, seek medical advice immediately (show label where possible) .
S60:This material and/or its container must be disposed of as hazardous waste .
S61:Avoid release to the environment. Refer to special instructions safety data sheet . | [RIDADR ]
UN 2810 | [WGK Germany ]
3 | [RTECS ]
TE3850000 | [HazardClass ]
6.1(b) | [PackingGroup ]
III | [Hazardous Substances Data]
17109-49-8(Hazardous Substances Data) | [Toxicity]
LD50 in female, male rats (mg/kg): 25.5, 66.5 i.p. (Chen) |
| Hazard Information | Back Directory | [Uses]
Edifenphos is a foliar applied contact fungicide that provides both
protective and curative control of rice blast diseases caused by Pyricularia
oryzae. It also controls ear blight and stem rot in rice. | [Uses]
Fungicide. | [Definition]
ChEBI: An organic thiophosphate that is the O-ethyl-S,S-diphenyl ester of phosphorodithioic acid. Used to control a variety of fungal diseases on rice including blast, ear blight and stem rot. Edifenphos i
moderately toxic to mammals and fish but poses more of a risk to aquatic invertebrates. | [Metabolic pathway]
Hydrolytic cleavage of the P-0 and P-S linkages affords the major
degradation and metabolic pathways of edifenphos. A unique transesterification
reaction yielded tri-S-phenyl and di-O-ethyl phosphorus
esters as minor products in soil and plant test systems (Scheme 1). | [Degradation]
The hydrolytic DT50 values of edifenphos (1) at pH 7 and 9 at 25 °C
were 19 and 2 days, respectively (PM). [35S]Edifenphods egraded rapidly
in aqueous solution when exposed to UV light at 25-28 °C [DT50 ca. 3 days
(light exposed) vs. 19 days (dark control)]. Cleavage of the P-S linkage is
the primary degradation pathway. Thiophenol (2) was further oxidised
to form diphenyl disulfide (3), possibly during sample extraction, isolation
and analysis. Stepwise cleavage of the P-S and P-O linkages yielded
O-ethyl S-phenyl hydrogen phosphorothioate (4), S-phenyl dihydrogen
phosphorothioate (5), benezenesulfonic acid (6) and sulfuric acid as
major 35S-containing products, whereas O-ethyl dihydrogen phosphate
(7) and phosphoric acid were recovered from the phosphorus portion of
the molecule (Murai, 1977). | [Toxicity evaluation]
Edifenphos shows no delayed neuropathic symptoms.
Safety intervals between spray and harvest for rice are
21 days in Japan with 0.2 mg of MRL (Maximum Residue
Limit). |
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