Guiyang Bestchem Co. Ltd

Guiyang, China

We are offering permethrin. product name: permethrinformula:c21h20cl2no3formula weight:391.30cas no:52645-53-1chemical name:3-phenoxybenzyl-(1r, s)-cis, trans-2, 2-dimethyl-3-(2, 2-dichlorovinyl)cyclopropanecarboxylate uses: permethrin is a high-effective, broad-spectrum, low-toxic and residue pyrethroid of light-stableness. It has strongcontact and stomach poisoning activity. It is an ovicide with repellent activity. Without cyanic in its structure, theirritation is slight. It is mainly used to control vector insect (e.g.mosquitoes, flies. And cockroach), and moth inwool, leather, limber and furniture. It is also used in prevention and control of pests in cotton, rice, crop, fruit tree, vegetables, tea tree, and forest. appearance:faint yellow-faint brown sticky liquid. may turn to be solid for a long time storage. specific gravity:1.21(d420)boiling point:2001.33pa or 2206.67pavapor pressure:4.5310-5pa(25)viscosity:250cp(30)solubility:hardly soluble in water, but soluble in organic solvents. stability:stable in neutral acidic medium, but easlily hydrolyzed in alkaline solution; light resistant; not corrosive. toxicity:acute oral ld50 to rats is more than 2000mgkg. Acute dermal ld50 to rats is more than 2500mgkg, acute inhalant lc50 to rats is more than 23.5mgl air. No irritation to skin, and slight irritation to eyes. quality index: permethrin technicalappearance :faint yellow-faint brown viscous liquid. top class:content95.0% a class :content 93.0% moisture 0.2% acid degree 0.15% acetone infusibility0.1% package:gross weight:31kg, net:25kgsize:315h4300.8mm

We are offering d allethrin. product name: d-allethrin formula: c19h26o3formula weight: 302.42cas no: 584-79-2 chemical.name: (r, s)-3-allyl-2-methyl-4-oxo-cyclopent-2-enyl-(1r)-cis, trans-chrysanthemate uses: d-allethrin is used mainly for the control of flies and mosquitoes in the home, flying and crawing insects on farm, animals, and fleas and ticks on dogs and cats. It is formulated as aerosol, sprays, dusts, smoke coils and mats.it isused alonely or combined with synergists(e.g.fenitrothion) it is also available in form of emulsifiable concentratesand wettable, powders, synergistic formulations(aerosols ordips) have been used on fruits and vegetables , post-harvest, in storage, and in processing plants. Post-harvest use on stored grain(surface treatment)has also beenapproved in some countries. appearance: pale yellow to amber viscous transparent liquid. specific gravity:1.005-1.015(d420)boiling point:1400.1mmhgflash point:130vapor pressure:3.310-4mmhg(25)solubility:insolube in water. Easily solube in organic solvents. (e, g methanol, hexane, xylene, acetone, carbon, tetrachloride, kerosene, petroleum. stability:can be stored over 2 years in normal condition, alkaline and ultraviolet radiation can drive it decompose. toxicity:acute oral ld50 :440-1320mgkg (rats), acute dermal ld50:>2500mgkg(rats ).acute inhalant lc50 :>1650mgl(rats). No irritation to skin and eyes of rabbits. quality index: d-allethrin technicalappearance :pale yellowish to amber viscous transparent liquid. top class:total ester 95.0% , high effect isomer92.0% a class:total ester 93.0% , high effect isomer 90.0% moisture 0.2% acid degree 0.3% package:gross weight:31kg, net:25kg, size:315h4300.8mm

We are offering alpha-cypermethrin. product name: alpha-cypermethrinformula:c22h19cl2no3formula weight:416.35cas no:67375-30-8 chemical name:2, 2-dimethyl-3-(2, 2-dichlorovinyl)cyclopropanecarboxylate--cyano-(3-phenoxy)-benzylester uses: beta-cypermethrin having high killing ability and rapid knock-down function to insect by contact and stomachtoxicity, this product is an active and broad insect killer. It can high-effectively kill lepidoptera, hemiptera, diptera, homoptera, coleoptera and injurious insects on contton, vegetable, fruit tree and other crops. It canalso high effectively kill such injurious insects as mosquito, cockroach, flea, bug and ant. It while effect 2 timeshigher than cypermethrin. appearance:white or milky yellow crystal or powder. melting point:60-65solubility:difficultly dissolved in water. Easily dissolved in ketone and aromatic hydrocarbon and can be dissolved inalcohol as well. stability:stable in neutral and weak acidic condition. Easily decomposed in alkaline. Undecomposed for two years when stored under normal temperature. toxicity:acute oral ld50: 694mgkg(rats), acute dermal ld50: 1830mgkg(rats), acute inhalant lc50: 32mgl minimal safe dosage to rat 60ppm diet. Irritating to skin and membrane. Highly toxic to fish, honey, silkworm and earthworm quality index: beta-cypermethrin technicalappearance :white-light yellow solid. top class:high effect form97.0% , dry deduction 0.1% a class :high effect form95.0% , dry deduction 0.3% ph:4.0-6.0 package:gross weight:32kg, net:25kg size:315h4300.8mm

We offer Transfluthrin Insecticide CAS No.:118712-89-3Place of Origin:Guiyang, China (Mainland).State: GranularPurity:94%Application:Fast-acting insecticide against mosquitoes, flies, cockroaches and wh Description: NOMENCLATURECommon name: transfluthrinIUPAC name: 2, 3, 5, 6-tetrafluorobenzyl (1R, 3S)-3-(2, 2-dichlorovinyl)-2, 2-dimethylcyclopropanecarboxylateRoth: 2, 3, 5, 6-tetrafluorobenzyl (1R)-trans-3-(2, 2-dichlorovinyl)-2, 2-dimethylcyclopropanecarboxylateChemical Abstracts name: (1R-trans)-(2, 3, 5, 6-tetrafluorophenyl)methyl 3-(2, 2-dichloroethenyl)-2, 2-dimethylcyclopropanecarboxylateEEC no.: 405-060-5 PHYSICAL CHEMISTRYMol. wt.: 371.2;M.f.: C15H12Cl2F4O2;Form: Colourless crystals.M.p.: 32C; B.p.: 135C0.1 mbar;V.p.: 4.0x10-1 mPa (20C).KOW: logP = 5.46 (20C).Henry: 2.60 Pa m3 mol-1 (calc.).S.g.density: 1.5072 gcm3 (23C).Solubility: In water 5.7x10-5 gl (20C). In organic solvents >200 gl.Stability: No decomposition after 5 h at 200C. DT50 in pure water (25C) >1 y (pH 5), >1 y (pH 7), 14 d (pH 9). APPLICATIONSBiochemistry: Effector on presynaptic voltage gate sodium channels in nerve membranes, causing knockdown effects in insects.Mode of action: Insecticide active by inhalation and contact; also repellent.Uses: Fast-acting insecticide against mosquitoes, flies, cockroaches and whitefly. Formulation types: AL; FU; VP; XX; Spraying cans; Vapouriser liquid; Mosquito coils. MAMMALIAN TOXICOLOGYOral: Acute oral LD50 for male and female rats >5000, male mice 583, female mice 688, hens >5000 mgkg.Skin and eye: Acute percutaneous LD50 (24 h) for male and female rats >5000 mgkg.Inhalation: LC50 (4 h) for male and female rats >513 mgm3 air.NOEL: (24 mo) for male and female rats 20 ppm, for male and female mice 100 ppm.Toxicity class: WHO (a.i.) III (Table 5)EC hazard: Xi; R38 N; R50, R53 ECOTOXICOLOGYBirds: Acute oral LD50 for Virginian tree quail (Colinus virginianus) and canary birds (Serinus canarius) >2000 mgkg.Fish: LC50 (96 h) for golden orfe 1.25, rainbow trout 0.7 ugl.Daphnia: LC50 (48 h) 0.0017 mgl.Algae: EC50 (96 h) for Scenedesmus subspicatus >0.1 mgl. ENVIRONMENTAL FATEAnimals: Tetrafluorobenzoic acid and the glucuronate of tetrafluorobenzyl alcohol are formed.SoilEnvironment: In aquatic ecosystems, tetrafluorobenzyl alcohol and tetrafluorobenzoic acid are formed. DT50 in water 2 d (in light), 8 d (in dark). Packing: Exporting standard drums, 25kgdrum