29973-13-5 Usage
Uses
Used in Agriculture:
Ethiofencarb is used as a systemic insecticide for controlling aphids on various crops. It has both contact and stomach action, making it effective against these pests.
Used in Fruit Crops:
Ethiofencarb is used as a systemic insecticide for controlling aphids on fruit crops, helping to protect the yield and quality of the fruits.
Used in Vegetables:
Ethiofencarb is used as a systemic insecticide to control aphids on vegetable crops, ensuring the health and productivity of the plants.
Used in Ornamentals:
Ethiofencarb is used as a systemic insecticide to control aphids on ornamental plants, maintaining their aesthetic appeal and overall health.
Used in Sugar Beet:
Ethiofencarb is used as a systemic insecticide to control aphids on sugar beet crops, safeguarding the crop's health and sugar production.
Preparation
Ethiofencarb is produced by reaction of 2-chloromethyl
phenol with sodium ethylmercaptide to form 2-ethylthio
methylphenol, which in turn is reacted with methylisocyanate.
Environmental Fate
Plant. Degrades in plants to the sulfone and sulfoxide (Hartley and Kidd, 1987).
Metabolic pathway
Ethiofencarb is metabolised by rapid oxidation at sulfur, hydrolysis of the
carbamate group to give phenols, hydroxylation of the N-methyl moiety
and conjugation.
Degradation
Ethiofencarb is stable in neutral and acidic but is hydrolysed under basic
conditions. DT50 values at pH 7 and 11.4 (37 °C) were 450 hours and
5 minutes, respectively. The kinetics of hydrolysis of ethiofencarb in
pure water and in aqueous solutions at pH 2,6,9,12 and at temperatures
in the range 4-50°C were studied. No acid hydrolysis was observed.
Ethiofencarb was rapidly hydrolysed at pH 9 and 12. Ethiofencarb in
pure water at room temperature reached an equilibrium with 80%
remaining undegraded (Sanz-Asensio et al., 1997).
Photodegradation of aqueous solutions in sunlight is rapid (PM). The
oxidative photodegradation of ethofencarb was studied in aqueous
acetonitrile using anthraquinone to mimic natural photosensitisers. Solutions
were irradiated with a Hg lamp (400 W) for 48 minutes. The
emission spectrum of the lamp was not described. Reaction products
were identified by GC-MS methods. The main products were 2-
hydroxybenzaldehyde (2) and 3-methylbenzo[e-1,3]oxazine-2,4-dione(3)
(see Scheme 1). Products resulted from photocleavage of the CH,-S bond
and/or the C-O bond followed by hydrogen atom abstraction and
photo-oxidation. An electron-acceptor photosensitiser may increase rates
of photodegradation (Galadi and Julliard, 1996). Solutions of ethiofencarb
in cyclohexane, cyclohexene or isopropanol were irradiated with a high
pressure Hg lamp (cut-off filter <280 nm) or natural sunlight (Germany,
May-July). Analysis was by HPLC with diode-array detection, NMR, IR
and MS. Half-lives of photodegradation were in the range 20 minutes
to more than 20 hours. The predominant reaction (Scheme 1) was
photo-oxidation of ethiofencarb to its sulfoxide (4). The cyclic dione (3)
was a product of oxidation at the benzylic position. Ethiofencarb was
photo-oxidised in cyclohexane to the sulfoxide (4) and the sulfone (5) and
their corresponding phenols (8 and 9), the latter being a minor product.
Subsequently the cyclised dione (3) was formed. In isopropanol,
reaction with solvent gave addition products (6 and 7) and an unusual
bis-diethylthio compound (10) (Kopf and Schwack, 1995).
Check Digit Verification of cas no
The CAS Registry Mumber 29973-13-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 2,9,9,7 and 3 respectively; the second part has 2 digits, 1 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 29973-13:
(7*2)+(6*9)+(5*9)+(4*7)+(3*3)+(2*1)+(1*3)=155
155 % 10 = 5
So 29973-13-5 is a valid CAS Registry Number.
InChI:InChI=1/C11H15NO2S/c1-3-15-8-9-6-4-5-7-10(9)14-11(13)12-2/h4-7H,3,8H2,1-2H3,(H,12,13)
29973-13-5Relevant academic research and scientific papers
Halogen alkenyl azolyl microbicides
-
, (2008/06/13)
Novel halogenoalkenyl-azolyl derivatives of the formula STR1 in which R1 represents optionally substituted alkyl, optionally substituted alkenyl, optionally substituted cycloalkyl, optionally substituted aryl or represents optionally substituted heteroaryl, R2 represents alkyl, halogenoalkyl, 1-hydroxyalkyl, 2-hydroxyalkyl, 1-hydroxyhalogenalkyl, 1-alkenyl or 2-alkenyl, X1 represents fluorine, chlorine, bromine or iodine, X2 represents fluorine, chlorine, bromine or iodine, and Y represents nitrogen or a CH group, and addition products thereof with acids or metal salts are very active as microbicides in plant protection and in the protection of materials.
Biocidal macroemulsions containing polyvinyl alcohol
-
, (2008/06/13)
The present invention relates to new macroemulsions which contain 0.001 to 60 percent by weight of at least one active compound from the class comprising the phosphates and/or carbamates, 0 to 50 percent by weight of aromatic diluents, 0.001 to 20 percent by weight of polyvinyl alcohol having a mean molecular weight of between 5,000 and 150,000 and a content of acetate groups of between 2 and 30 mol %, and/or 0.001 to 20 percent by weight of a nonlphenol/propylene oxide/ethylene oxide adduct of the formula STR1 in which X represents integers from 10 to 50 and Y represents integers from 15 to 65, and/or 0.001 to 20 percent by weight of ethylene oxide/propylene oxide/ethylene oxide block copolymers having a mean molecular weight of between 2,000 and 8,000 and HLB values of between 8 and 30, and water and, if appropriate, additives, and in which the oil phase is dispersed in the aqueous phase in the form of droplets having a mean particle diameter of 0.1 to 3.0 μm.
Preparation of organic sulfone compounds
-
, (2008/06/13)
An in-situ process for preparing organic sulfone compounds by oxidizing the corresponding sulfide compound with a mixture of hydrogen peroxide, a carboxylic acid in the presence of a catalytic amount of a mineral acid or an organic sulfonic acid.
