Fensulfothion is a systemic
previously but not currently registered for insecticidal
and nematicidal activity in the United States.
Fensulfothion is a yellow oil.
Nematocide and pesticide used to control free-living, cyst-forming and root-knot nematotodes and soil insects in vegetable and fruit crops.
Fensulfothion is a highly toxic insecticide used for agriculture purposes.
Fensulfothion is commercially synthesised by esterifying O,O-diethyl phosphorothioic acid with 4-(methylsulfinyl)phenol. This reaction typically occurs in an organic solvent with a base to neutralise the hydrochloric acid by-product and ensure high yield and purity.
ChEBI: Fensulfothion is an organic thiophosphate, a sulfoxide and an organothiophosphate insecticide. It has a role as an EC 3.1.1.7 (acetylcholinesterase) inhibitor, an agrochemical, an avicide and a nematicide. It is functionally related to a 4-(methylsulfinyl)phenol.
Oily yellow or brown liquid. Used as an insecticide, nematocide and mosquito larvicide.
Incompatible with alkali chemicals. Hydrolyzes in alkali, isomerize in air [EPA, 1998]. Slightly soluble in water.
Organothiophosphates, such as FENSULFOTHION, are susceptible to formation of highly toxic and flammable phosphine gas in the presence of strong reducing agents such as hydrides. Partial oxidation by oxidizing agents may result in the release of toxic phosphorus oxides.
Cholinesterase inhibitor. Questionable carcinogen.
FENSULFOTHION displays cholinesterase inhibiting properties. Death results primarily from respiratory arrest stemming from failure of the respiratory center, paralysis of respiratory muscles and intense bronchoconstriction.
(Non-Specific -- Organophosphorus Pesticide, Liquid, n.o.s.) FENSULFOTHION may burn but may not ignite readily. Containers may explode in heat of fire. When heated highly toxic fumes of phosphorus and sulfur oxides are emitted. Incompatible with alkali chemicals. Hydrolyzes in alkali, isomerizes in air.
Contact action. Acetylcholinesterase (AchE) inhibitor.
A poison by ingestion,
inhalation, and skin contact. Experimental
reproductive effects. A pesticide. When
heated to decomposition it emits very toxic
fumes of SOx and POx.
A potential danger to those involved
in the manufacture, formulation, or application of this
insecticide used to control parasitic, sedentary, and freeliving nematodes.
If this chemical gets into the eyes, remove anycontact lenses at once and irrigate immediately for at least15 min, occasionally lifting upper and lower lids. Seek medical attention immediately. If this chemical contacts theskin, remove contaminated clothing and wash immediatelywith soap and water. Speed in removing material from skinis of extreme importance. Shampoo hair promptly if contaminated. Seek medical attention immediately. If thischemical has been inhaled, remove from exposure, beginrescue breathing (using universal precautions, includingresuscitation mask) if breathing has stopped and CPR ifheart action has stopped. Transfer promptly to a medicalfacility. When this chemical has been swallowed, get medical attention. Give large quantities of water and inducevomiting. Do not make an unconscious person vomit. Keepvictim quiet and maintain normal body temperature. Effectsmay be delayed; keep victim under observation.
Soil. In soils, the bacterium Klebsiella pneumoniae degraded fensulfothion to fensulfothion sulde (Timms and MacRae, 1982, 1983). The following microorganisms were also capable of degrading the parent compound to the corresponding sulde: Escherichia coli, Pseudomonas uorescens, Nocardia opaca, Lactobacillus plantarum and Leuconostoc mesenteroides (Timms and MacRae, 1983).
Plant. Readily oxidized in plants to the corresponding sulfone (Hartley and Kidd, 1987).
Chemical/Physical. Emits toxic fumes of phosphorus and sulfur oxides when heated to decomposition (Sax and Lewis, 1987; Lewis, 1990).
Isomerizes readily to the O,S-diethyl isomer (Worthing and Hance, 1991). The hydrolysis half-lives of fensulfothion in a sterile 1% ethanol/water solution at 25°C and pH values of 4.5, 6.0, 7.0 and 8.0, were 69, 77, 87 and 58 weeks, respectively (Chapman and Cole, 1982).
Color Code—Blue: Health Hazard/Poison: Storein a secure poison location. Prior to working with thischemical you should be trained on its proper handlingand storage. Store in tightly closed containers in a cool,well-ventilated area away from strong bases; strong oxidizers. Where possible, automatically pump liquid fromdrums or other storage containers to process containers.
UN3018 Organophosphorus pesticides, liquid,
toxic, Hazard Class: 6.1; Labels: 6.1-Poisonous materials.
UN2810 Toxic liquids, organic, n.o.s., Hazard Class: 6.1;
Labels: 6.1-Poisonous materials, Technical Name Required
Incompatible with oxidizers (chlorates,
nitrates, peroxides, permanganates, perchlorates, chlorine,
bromine, fluorine, etc.); contact may cause fires or explosions. Keep away from alkaline materials, strong bases,
strong acids, oxoacids, epoxides. Strong oxidizers may cause
release of toxic phosphorus oxides. Organophosphates, in the
presence of strong reducing agents such as hydrides, may
form highly toxic and flammable phosphine gas. Keep away
from alkaline materials.
Alkaline hydrolysis. In
accordance with 40CFR165, follow recommendations for
the disposal of pesticides and pesticide containers. Must be
disposed properly by following package label directions or
by contacting your local or federal environmental control
agency, or by contacting your regional EPA office.
