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Malathion Insecticide

Posted at: Offers to Sell and Export | Posted on: Fri 18 Jun, 2010 7:43 am | Product Category: Insecticides [73]
 
malathion insecticide
Products Photos CatalogMalathion Insecticide Photos Catalog



Common name: malathion; maldison; malathon; mercaptothion; carbofos; mercaptotion

IUPAC name: diethyl


(dimethoxythiophosphorylthio)succinate; S-1, 2-bis(ethoxycarbonyl)ethyl O, O-dimethyl phosphorodithioate

Chemical Abstracts name: diethyl [(dimethoxyphosphinothioyl)thio]butanedioate

Cas rn: [121-75-5]

Physical chemistry

Composition: Tech. grade is c. 95% pure. Mol. wt.: 330.3; M.f.: C10H19O6PS2; Form: Tech. is a clear, amber liquid. M.p.: 2.85 C; B.p.: 156-157 C/0.7 mmHg. V.p.: 5.3 mPa (30 C). KOW: logP = 2.75; Henry: 1.21x10-2 Pa m3 mol-1 (calc.) S.g./density: 1.23 (25 C). Solubility: In water 145 mg/l (25 C). Miscible with most organic solvents, e.g. alcohols, esters, ketones, ethers, aromatic hydrocarbons. Slightly soluble in petroleum ether and some types of mineral oil. Stability: Relatively stable in neutral, aqueous media. Decomposed by strong acids and by alkali; hydrolysis DT50 107 d (pH 5), 6 d (pH 7), 0.5 d (pH 9) (all 25 C). F.p.: 163 C (Pensky-Martens closed cup).

Applications

Biochemistry: Cholinesterase inhibitor; proinsecticide, activated by metabolic oxidative desulfuration to the corresponding oxon.

Mode of action: Non-systemic insecticide and acaricide with contact, stomach, and respiratory action.

Uses: Used to control Coleoptera, Diptera, Hemiptera, Hymenoptera and Lepidoptera in a wide range of crops, including cotton, pome, soft and stone fruit, potatoes, rice and vegetables. Used extensively to control major arthropod disease vectors (Culicidae) in public health programmes, ectoparasites (Diptera, Acari, Mallophaga) of cattle, poultry, dogs and cats, human head and body lice (Anoplura), household insects (Diptera, Orthoptera), and for the protection of stored grain. Typical application rates for agricultural uses 0.5-1.25 kg/ha.

Phytotoxicity: Non-phytotoxic in general, if used as recommended, but glasshouse cucurbits and beans, certain ornamentals, and some varieties of apple, pear, and grape may be injured.

Formulation types: DP; EC; EW; UL; WP.

Compatibility: Incompatible with alkaline materials (residual toxicity may be decreased).

Mammalian toxicology

Oral: Acute oral LD50 for rats 1375-5500 mg/kg (pure), mice 775-3320 mg/kg.

Skin and eye: Acute percutaneous LD50 (24 h) for rabbits 4100-8800, rats >2000 mg/kg.

Inhalation: LC50 (4 h) for rats >5.2 mg/l.

NOEL: In 2 y trials on rats, the only effects seen at 500 ppm (29 mg/kg b.w. daily) was inhibition of cholinesterase in plasma and red blood cells.

ADI: 0.3 mg/kg b.w.

Toxicity class: WHO (a.i.) III; EPA (formulation) III (Fyfanon tech. and 5 EC)

EC hazard: Xn; R22

Ecotoxicology

Birds: Dietary LC50 (5 d) for bobwhite quail 3500, ring-necked pheasants 4320 mg/kg diet.

Fish: LC50 (96 h) for bluegill sunfish 0.1, largemouth bass 0.28 mg/l.

Daphnia: EC50 (48 h) 1.0 ug/l.

Algae: EC50 (72 h) 13 mg/l.

Bees: Toxic to bees. LD50 (topical) 0.71 ug/bee.

Worms: LC50 613 mg/kg soil.

Environmental fate

Animals: In mammals, following oral administration, the major part of the dose is excreted in the urine and faeces within 24 hours. Degradation is by oxidative desulfuration by liver microsomal enzymes, leading to the formation of malaoxon; malathion and malaoxon are hydrolysed and thus detoxified by carboxylesterases. In insects, metabolism involves hydrolysis of the carboxylate and phosphorodithioate esters, and oxidation to malaoxon.

Plants: De-esterified to its mono- and di- carboxylic acids, which are cleaved to yield succinic acid, which is subsequently incorporated into plant constituents.

Soil/Environment: Under normal conditions, it is 99% degraded by hydrolysis within 7 d.



Company Contact:

No member photo
Contact Name: Kevin Xu
Company Name: Shanghai Skyblue Chemical Co., Ltd.
Email: Email
Tel: 86-21-58356613
Fax: 86-21-58358362
Street Address: Rm 15A02, Changhang
Mansion, No.800, Zhangyang Road,
Pudong, Shanghai, 200122, China
Website: http://www.skybluechem.com
Member name: skybluechem
Country: China-CN China
Member Since: 17 June 2010
Total Leads: 76 skybluechem Import Export Business Leads
Business focus: Piperonyl Butoxide, D-allethrin, Diethyltoluamide, Cartap, Tetramethrin, Atrazine, Quizalofop-p-ethyl, Tribenuron-methyl, Acetochlor, Ametryn, Simazine
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Product Category: Insecticides [73]
 
 
 

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