52918-63-5

Basic information

• Product Name: Deltamethrin
• Synonyms: (1r-(1-alpha(s*),3-alpha))-oxyphenyl)methyleste;(S).alpha.-Cyano-phenoxybenzyl(1R,3R)-3-(2,2-dibromoethenyl)-2,2-dimethylcyclopropanecarboxylate;(s)-alpha-cyano-3-phenoxybenzyl-(1r)-cis-3-(2,2-dibromovinyl)-2,2-dimethyl-cyc;(s)-alpha-cyano-3-phenoxybenzyl(1r,3r)-3-(2,2-dibromovinyl)-2,2-dimethyl-cyc;(S)-α-cyano-3-phenoxybenzyl(1R)-cis-3-(2,2-dibromovinyl)-2,2-dimethylcyclopropanecarboxylate;[1R-[1alpha(S*),3alpha]]-Cyano(3-phenoxyphenyl)methyl 3-(2,2-dibromomethenyl)-2,2-dimethylcyclopropanedicarboxylate;[1r-[1alpha(s*),3alpha]]-cyano(3-phenoxyphenyl)methyl3-[2,2-dibromoethenyl)-2,;2,2-dimethylcyclopropanecarboxylate)
• CAS NO: 52918-63-5
• Molecular Formula: C₂₂H₁₉Br₂NO₃
• Molecular Weight: 505.2
• EINECS: 258-256-6
• Product Categories: Aromatics Compounds;INSECTICIDE;Aromatics;Chiral Reagents;Mutagenesis Research Chemicals;Alpha sort;D;DA - DHMethod Specific;DAlphabetic;Insecticides;Oeko-Tex Standard 100;Pesticides&Metabolites;PesticidesPesticides;Pyrethroids;Alphabetic;Pesticide intermediates;NULL;Aromatics, Chiral Reagents, Mutagenesis Research Chemicals
• Mol File: 52918-63-5.mol
• Article Data: 42

Chemical Properties

• Melting Point: 98°C
• Boiling Point: 300°C
• Flash Point: -18 °C
• Appearance: Colorless/Crystalline
• Density: 1.5214 (rough estimate)
• Vapor Pressure: 1.49E-11mmHg at 25°C
• Refractive Index: 1.6220 (estimate)
• Storage Temp.: −20°C
• Solubility: Soluble in DMSO (up to 50 mg/ml)
• Water Solubility: <0.0002 mg l-1 (25 °C)
• Stability: Stable. Incompatible with acids, alkalies, strong oxidizing agents.
• Merck: 14,2883
• BRN: 6746312
• CAS DataBase Reference: Deltamethrin(CAS DataBase Reference)
• NIST Chemistry Reference: Deltamethrin(52918-63-5)
• EPA Substance Registry System: Deltamethrin(52918-63-5)

Safety Data

• Hazard Codes: T,N,Xn,F
• Statements: 23/25-50/53-67-65-38-11
• Safety Statements: 24-28-36/37/39-38-45-60-61-62-16
• RIDADR: UN 2811 6.1/PG 2
• WGK Germany: 3
• RTECS: GZ1233000
• HazardClass: 6.1(a)
• PackingGroup: II
• Hazardous Substances Data: 52918-63-5(Hazardous Substances Data)

Usage

Description

Deltamethrin is a synthetic pyrethroid insecticide that belongs to the type II pyrethroids, which are hydrophobic in nature. It acts as a potent inhibitor of calcineurin (protein phosphatase 2B) and modulates voltage-gated sodium channels (Nav). Deltamethrin is effective against a wide range of insects and is used in agriculture, home pest control, protection of foodstuff, and disease vector control. It is a colorless, white, or off-white crystalline solid or powder, odorless, and combustible.

Uses

Used in Agriculture:
Deltamethrin is used as an insecticide for the control of various insects in fruit, cereals, vegetables, cotton, soyabeans, and oilseed rape.
Used in Home Pest Control:
Deltamethrin is used as an insecticide for the control of crawling and flying insects indoors.
Used in Stored Grain and Timber:
Deltamethrin is used as an insecticide for the control of insects in stored grain and timber.
Used in Ectoparasite Control on Animals:
Deltamethrin is used as an insecticide for the control of ectoparasites on animals.
Used in Disease Vector Control:
Deltamethrin is used as an insecticide for the control of disease-carrying insects, contributing to disease vector control.

Potential Exposure

Deltamethrin is a synthetic pyrethroid insecticide that kills insects on contact and through diges- tion. It is used to control a variety of chewing and sucking insects that infest fruit, vegetables and field crops, includ- ing apples, pears and plums; peas, glasshouse cucumbers, tomatoes, peppers, potted plants, and ornamentals; hops, oats, cotton and other field crops. Deltamethrin is also used to control residential and commercial insect pests. Some formulations are RUPs)

Environmental Fate

Deltamethrin is a type II pyrethroid, a functional neurotoxin slowing the inactivation of voltage-gated sodium channels leading to a state of hyperexcitability which in turn causes fine tremor, salivation, and choreoathetosis. Other proposed contributory actions include antagonism of gammaaminobutyric acid A receptor inhibition and voltage-gated chloride and calcium channels.

Metabolic pathway

After oral administration of 14C-deltamethrin to lactating dairy cows, deltamethrin is metabolized and excreted in the bile and urine with very little accumulation in major edible tissues. The major portion (78-82%) of the radioactivity in feces is deltamethrin. Only 4-6% is eliminated in the urine and 0.42 ? 1.62% is secreted in the milk. The primary biotransformation is via the hydrolysis of the ester linkage followed by oxidation of the geminal methyl groups of cyclopropane carboxylic acids and phenoxy benzaldehyde, resulting in dicarboxylic acid, lactonecarboxylic acid, or phenoxybenzoic acid derivatives. Deltamethrin is not metabolized within algae cells and mouse fibroblasts, but is partially transformed into less or not active isomers. In algae and fibroblast culture media, many metabolites of deltamethrin resulting mostly from hydrolysis of the molecule are found. This metabolism seems to be linked with the release of enzymes by cells into the culture medium.

Shipping

UN2811 Toxic solids, organic, n.o.s., Hazard Class: 6.1; Labels: 6.1-Poisonous materials, Technical Name Required.UN3349 Pyrethroid pesticide, solid toxic, Hazard Class: 6.1; Labels: 6.1-Poisonous materials.

Degradation

Deltamethrin is very stable as a solid but it is readily hydrolysed in solution under alkaline conditions with a DT50 of 2.5 days at pH 9 (25 °C). By analogy with cypermethrin, the rate-determining step in dilute solution is nucleophilic attack by OH-. Isomerisation has been shown to occur in natural waters under dark conditions, yielding the inactive 1 ScisaS isomer (Maguire, 1992). Aqueous photolysis (sunlight) causes slow degradation but also isomerism to the insecticidally active 1RtransaS form. These isomerisation reactions, which are more rapid than those of cypermethrin, were reported much earlier by Ruzo et al. (1977). This is due to the heavy atom effect (bromine). Similarly, the decreased bond strength of C-Br (ct C-Cl) leads to photocatalysed reductive debromination, with tans- favoured over cisdebromination by a factor of 4. The DT50 on soil photolysis is 9 days (PM). Photolysis of the ester bond is the main reaction of deltamethrin. Solvent effects are important. cis-3-(2,2-Dibromovinyl)-2,2-dimethylcyclopropanecarboxylic acid (2) and 3PBA (4) are the major products in water (Scheme 1). A minor product (5) was formed by decarboxylation. Deltamethrin is resistant to photo-oxidation. The mechanisms of photodegradation of the pyrethroids have been reviewed by Ruzo (1982).

Toxicity evaluation

Deltamethrin is twofold more persistent in aquatic environments than in soil. Depending on conditions the environmental half-life ranges from 2 days (for hydrolysis at pH 9) to 80 days (for degradation in an aquatic environment).

Waste Disposal

ncineration would be an effective disposal procedure where permitted. If an efficient incinerator is not available, the product should be mixed with large amounts of combustible material and contact with the smoke should be avoided. In accordance with 40CFR165, follow recommendations for the disposal of pesticides and pesticide containers.

References

Adams, A. J. "A review of the efficacy and uses of deltamethrin for wood preservation." Document - the International Research Group on Wood Preservation (Sweden) (1996). Sayeed, I, et al. "Oxidative stress biomarkers of exposure to deltamethrin in freshwater fish, Channapunctatus Bloch." Ecotoxicology & Environmental Safety 56.2(2003):295-301. Yousef, Mokhtar I., T. I. Awad, and E. H. Mohamed. "Deltamethrin-induced oxidative damage and biochemical alterations in rat and its attenuation by Vitamin E." Toxicology 227.3(2006):240-247.

InChI:InChI=1/C22H19Br2NO3/c1-22(2)17(12-19(23)24)20(22)21(26)28-18(13-25)14-7-6-10-16(11-14)27-15-8-4-3-5-9-15/h3-12,17-18,20H,1-2H3/t17-,18?,20+/m1/s1

Upstream product

• 3896-11-5 2-(3-tert-butyl-2-hydroxy-5-methylphenyl)-2H-5-chlorobenzotriazole 

Downstream Products

• 53179-78-5 2,2-dimethyl-3R-(2',2'-dibromovinyl)-cyclopropane-1R-carboxylic acid 
• 1141933-11-0 C₂₅H₂₁Br₂F₃O₃ 
• 1141933-10-9 C₂₅H₂₄Br₂O₃ 
• 1141933-09-6 C₂₄H₂₂Br₂O₃ 
• 1141933-08-5 C₂₃H₁₉Br₂ClO₃ 
• 1141933-07-4 C₂₃H₁₉Br₃O₃ 
• 1141933-06-3 C₂₃H₁₉Br₂IO₃ 
• 1141933-05-2 (-)-1-(3-phenoxyphenyl)-2-propynyl 2-(2,2-dibromoethenyl)-3,3-dimethylcyclopropanecarboxylate 
• 200798-95-4 4-{[2-[3-(2,2-Dichloro-vinyl)-2,2-dimethyl-cyclopropanecarbonyloxy]-2-(3-phenoxy-phenyl)-acetylamino]-methyl}-cyclohexanecarboxylic acid 2-trimethylsilanyl-ethyl ester 
• 200798-96-5 4-{[2-[3-(2,2-Dichloro-vinyl)-2,2-dimethyl-cyclopropanecarbonyloxy]-2-(3-phenoxy-phenyl)-acetylamino]-methyl}-cyclohexanecarboxylic acid 
• 200798-74-9 3-(2,2-Dibromo-vinyl)-2,2-dimethyl-cyclopropanecarboxylic acid (2-tert-butoxycarbonyl-ethylcarbamoyl)-(3-phenoxy-phenyl)-methyl ester 
• 200798-75-0 3-(2,2-Dichloro-vinyl)-2,2-dimethyl-cyclopropanecarboxylic acid (2-tert-butoxycarbonyl-ethylcarbamoyl)-(3-phenoxy-phenyl)-methyl ester 
• 200798-82-9 3-(2-tert-Butoxycarbonyl-ethylcarbamoyl)-2,2-dimethyl-cyclopropanecarboxylic acid cyano-(3-phenoxy-phenyl)-methyl ester 

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