Carbosulfan

Carbosulfan Basic information
Chemical properties Application Preparation Method Category Toxicity classification Acute toxicity Flammability Hazard Characteristics Storage and transportation Extinguisher
Product Name:Carbosulfan
Synonyms:((dibutylamino)thio)methylcarbamicacid,2,2-dimethyl-2,3-dihydro-7-benzofura;POSSE(R);ADVANTAGE(R);AGROSTAR;AMITAGE;2,3-DIHYDRO-2,2-DIMETHYL-7-BENZOFURANYL)-N-DIBUTYLAMINTHIO-N-METHYL-CARBAMATE;2,3-DIHYDRO-2,2-DIMETYL-7-BENZOFURANYL-[(DIBUTYLAMINO)THIO]METHYLCARBAMATE;2,3-DIHYDRO-2,2-DIMETHYLBENZOFURAN-7-YL (DIBUTYLAMINOTHIO)METHYLCARBAMATE
CAS:55285-14-8
MF:C20H32N2O3S
MW:380.54
EINECS:259-565-9
Product Categories:Intermediates & Fine Chemicals;Pharmaceuticals;INSECTICIDE;Sulfur & Selenium Compounds
Mol File:55285-14-8.mol
Carbosulfan Structure
Carbosulfan Chemical Properties
Melting point <25 °C
Boiling point approximate 126℃
density 1.0560
vapor pressure 3.1 x 10-5 Pa (20 °C)
refractive index 1.6360 (estimate)
Fp 96 °C
storage temp. 0-6°C
solubility Chloroform (Slightly), Methanol (Slightly)
form neat
pka3.15±0.70(Predicted)
Water Solubility 0.3 mg l-1 (25 °C)
Merck 13,1836
LogP6.050 (est)
CAS DataBase Reference55285-14-8(CAS DataBase Reference)
NIST Chemistry ReferenceCarbamic acid, [(dibutylamino)thio]methyl-, 2,3-dihydro-2,2-dimethyl-7-benzofuranyl ester(55285-14-8)
EPA Substance Registry SystemCarbosulfan (55285-14-8)
Safety Information
Hazard Codes T;N,N,T,T+
Risk Statements 23/25-43-50/53-26-25
Safety Statements 24-37-38-45-60-61-63-36/37-28
RIDADR UN 2810
WGK Germany 3
RTECS EZ3815000
HazardClass 6.1(b)
PackingGroup III
ToxicityLD50 in male, female rats (mg/kg): 250, 185 orally; in male, female rabbits (mg/kg): >2000, >2000 dermally; in pheasant, mallard, quail (ppm): 26.2, 8.1, 81.6 orally. LC50 (96 hr) in bluegill, trout (ppb): 14.9, 42.4 (Maitlen).
MSDS Information
Carbosulfan Usage And Synthesis
Chemical propertiesBrown sticky liquid. B.p. is124 ~ 128 ℃ (114 ℃). The flash point is 115~1,117℃, and the vapor pressure is 0.041 x 10-3Pa. The relative density is 1.056 (20℃). It can dissolve with acetone, ethanol and xylene, and the solubility in water is 0.3mg/L. The distribution coefficient is 157 (pH value is 7.05).
It has a fast decomposition in water, easily decomposed into carbofuran with pH<7. In the sun, when the 5 g/mL of Carbosulfan is in buffer solution with pH equaling to 7, the half-life period is 1.4d and 4 ~ 8d in distilled water.
Application
  • This product is a derivative of carbofuran, which has the same insecticidal activity as carbofuran .But its toxicity is much lower than carbofuran, a stomach insecticide .It can be metabolized into carbofuran in the organism and then play its effect to kill the insect. It has excellent control effect on the potato green peach aphid, black beetle, high dyed blind fly, cutworm and other insects. In addition, it can also better control cotton spider mite, billbug, tribolium confusum and spodoptera moth etc..
  • Carbamate insecticides, acaridants and nematides with high absorbability and broad-spectrum properties. It is a low toxic variety of Carbosulfan for the control of citrus, fruit trees, cotton and rice crops of aphids, mites, wireworm, beet and potato beetles, a hidden food tea leafhopper, Grapholitha molesta, codling moth and other pests. The administration concentration is 5mg/L and the effective component is 6.8 ~ 15g /100m2.
  • Low toxic insecticides with internal absorbability and broad-spectrum
  • For the control of rust ticks, aphids, thrips, leafhoppers and other more than 10 kinds of pests on the fruit trees, cotton, vegetables, grain and other crops.
Preparation MethodPreparation method 1:
Preparation of two n-butanamine sulphide Add two n-butyl amine and petroleum ether (60~90℃ ), mixing and cooling to 0℃ . Then slowly drip disulfur dichloride and maintain the temperature at 0~10 ℃. Afterwards, the reaction will be maintained at a constant temperature. The proportioning of the di-n-butylamine, disulfur dichloride and sulfuric chloride is 1:0.6:0.55(mol). The yield is 88%.
The synthesis of carbosulfan Two n-butanamine sulphur chloride reacts with carbosulfan with the ratio of 1:1. The reaction process is added with a proper amount of alkaline solution, and the reaction temperature is 10~20 ℃. The reaction time period is 2h. Add water and mix it for 10 minutes after the reaction. Filter it and the unreacted is carbosulfan which can be reused. The filtrate is stratified and the oil layer is decompressed and dissolving, and the yield is 90%.

Preparation method 2:
The synthesis of the intermediates hydroxyl compounds can be take the carbosulfan as reference. There are also literature reporting that starting from cyclohexanone and isobutyrate, five steps will be able to get it synthesized through condensation, chlorination, aromatization, hydrolysis and closed loop reaction. It is characterized by the synthesis of non aromatic compounds and is a highly selective synthesis route.
CategoryPesticides
Toxicity classificationHighly toxic
Acute toxicityOral administration-rats  LD50: 51 mg / kg;
Oral administration - mouse LD50: 74 mg / kg
FlammabilityCombustible
Hazard CharacteristicsCombustion can produce toxic nitrogen oxides and oxygen sulfide.
Storage and transportationThe storeroom is ventilated and dry at low temperature.
Separate transportation from food raw materials.
ExtinguisherDry powder, foam, sand.
DescriptionCarbosulfan (8),2,3-dihydro-2,2-dimethylbenzofuran- 7-yl(dibutylaminothio)methylcarbamate(IUPAC), is an orange to brown, clear viscous liquid (bp 124–128 ?C), miscible with organic solvents and solubility 0.3 ppm in water(25 ?C). It is closely related structurally to carbofuran,and like carbofuran, it is a cholinesterase inhibitor with systemic activity.
Chemical PropertiesOrange-yellow thick liquid.
UsesCarbosulfan is an insecticide with contact and stomach action. It is used to control a wide range of soil-dwelling and foliar pests in cotton, sugar beet, potato, rice, fruit, maize, vegetables, sugar cane and coffee.
DefinitionChEBI: Carbosulfan is a member of 1-benzofurans and a carbamate ester. It has a role as an EC 3.1.1.7 (acetylcholinesterase) inhibitor, a carbamate insecticide, an acaricide, an agrochemical and a nematicide.
General DescriptionViscous brown liquid.
Air & Water ReactionsThio and dithiocarbamates slowly decompose in aqueous solution to form carbon disulfide and methylamine or other amines. Such decompositions are accelerated by acids.
Reactivity ProfileCarbosulfan is a thiocarbamate. Flammable gases are generated by the combination of thiocarbamates and dithiocarbamates with aldehydes, nitrides, and hydrides. Thiocarbamates and dithiocarbamates are incompatible with acids, peroxides, and acid halides.
Potential ExposureCarbosulfan is a carbamate insecticide and a low toxic derivative from cabofuran. It is a broad spectrum insecticide, nematicide, miticide, effective against pests and mites. It is used to protect alfalfa, apple, citrus, corn, deciduous fruit, potato, rice, sorghum, soybean, sugar beets, sugarcane, and other vegetable, field, tree and orchard crops. It is used for seed treatments
Metabolic pathwayCarbosulfan is an N-sulfenyl-N-methylcarbamate which is effectively a pro-insecticide of carbofuran. The latter is formed in vivo by the biochemical or chemical thiolysis of carbosulfan. N-S Bond cleavage, oxidation, conjugation and hydrolysis are the main metabolic routes for carbosulfan in plants and animals. Carbosulfan is degraded via carbofuran in soil. In plants, carbosulfan is metabolised via carbofuran to 3-hydroxycarbofuran (PM).
MetabolismItsmetabolic patterns are similar to those of carbofuran. In rats, it rapidly undergoes hydrolytic and oxidative processes followed by conjugation. It is not persistent in soils, with DT50 ca. 2–5 days, and it was rapidly degraded to carbofuran in a sandy loam soil (4). Carbofuran was subsequently hydrolyzed at the carbamate ester group to form the phenol carbofuran or oxidized at the 3- position. Biscarbofuran disulfide and minor products were also detected. Carbofuran was also formed in soils by nonbiological degradation processes.
ShippingUN2992 Carbamate 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.
DegradationCarbosulfan is hydrolysed in aqueous media most rapidly under acidic conditions. Its DT50 values (25 °C) at pH 4,6 and 7 were <1 hour, 22 hours and 7.6 days respectively (PM). In a variety of aqueous solvents there was facile cleavage of the N-S carbamate bond of carbosulfan to yield carbofuran (2) as the sole or major product (see Scheme 1) (Umetsu et al., 1980). A solution of [14C]carbosulfanin propylene glycol was treated with 0.001 or 0.01 N aqueous HCl at 40 °C. Solutions were analysed at intervals up to 24 hours. Carbosulfan was relatively stable with more than 40% being recovered after 24 hours in the solution of lower acidity. Carbofuran (2) was the principal transformation product in hydrochloric acid. Biscarbofuran disulfide (3) was present in only trace amounts and small amounts of polysulfides of carbosulfan (4,n = 2-6) were detected (Umetsu and Fukuto, 1982).
Carbosulfan was quite stable in neutral and alkaline media. [14C-carbonyl]- or [14C-dibutylamino]Carbosulfan dissolved in dichloromethane: acetic acid (9:l) converted to a range of products via N-S bond cleavage. The principal products were carbofuran (2), dibutylamine and a mixture of polysulfide derivatives: bis-carbofuran disulfide (3) and a mixture of bis-carbofuran polysulfides (5). Structures of products were confirmed by MS and NMR (Umetsu et al., 1981a,b).
IncompatibilitiesCarbamates are incompatible with strong oxidizing acids, peroxides, and hydro-peroxides; strong reducing agents such as hydrides; strong acids and bases. Contact with nitrides or chemically active metals (aluminum, copper, magnesium, neptunium, sodium, tin, titanium,zinc, etc.) causes the release of potentially explosive hydrogen gas and a metal salt.
Waste DisposalDo not discharge into drains or sewers. Dispose of waste material as hazardous waste using a licensed disposal contractor to an approved landfill. Consult with environmental regulatory agencies for guidance on acceptable disposal practices. Incineration with effluent gas scrubbing is recommended. In accordance with 40CFR165, follow recommendations for the disposal of pesticides and pesticide containers. Noncombustible containers should be crushed and buried under more than 40 cm of soil. 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.
Pyridaben+Carbosulfan,E.C. Propoxur METOLCARB 2,3-Dihydro-2,2-dimethyl-7-benzofuranol Carbosulfan POLYURETHANE BENFURACARB tert-Butyldimethylsilyl chloride o-hydroxyphenyl carbamate 4-Aminobenzoic acid Carbofuran Urethane Methyl 4-tert-butylbenzoate o-hydroxyphenyl methylcarbamate Anthranilic acid Dihydromyrcenol CARBOSULFAN, 1 X 100MG, NEAT N,N-Dimethyl-1,4-phenylenediamine

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