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Chemical Identification
Common Name
Triazamate
中文通用名
唑蚜威
IUPAC
ethyl (3-tert-butyl-1-dimethylcarbamoyl-1H-1,2,4-triazol-5-ylthio)acetate
CAS
ethyl [[1-[(dimethylamino)carbonyl]-3-(1,1-dimethylethyl)-1H-1,2,4-triazol-5-yl]thio]acetate
CAS No.
112143-82-5
Molecular Formula
C13H22N4O3S
Molecular Structure
Category
Activity
Insecticide

Triazamate is a plant-systemic aphicide which moves both acropetally and basipetally. It acts primarily as a stomach poison and also has contact activity. The product has a rapid knockdown effect. Reductions in the number of aphids can be seen within one hour of application, with complete control within 24 hours. It also has residual activity lasting 2-3 weeks depending on species. Triazamate is specific to aphids. It is safe to beneficial insects and mites. The company notes that the use of adjuvants improves rainfastness and allows lower application rates to be used.

In field trials, triazamate gave similar or better results than standard insecticides at lower application rates. It is effective on strains of Myzus persicae (peach-potato aphid), Aphis gossypii (cotton aphid) and Phorodon humuli (damson-hop aphid) resistant to certain other insecticides.
CropUse
CropUses:
canola, oilseed rape, sugar beets, fruits, vegetables, hops, potatoes, sunflowers, ornamentals

Oilseed rape

70 g ai/ha

Potatoes

105-140 g ai/ha

Sugar beet

70 g ai/ha

Hops

7-14 g ai/ha

Apples

70 g ai/ha

Sunflowers

70 g ai/ha

Citrus

5-28 g ai/ha

Ornamentals

70-140 g ai/ha

Vegetables

35-140 g ai/ha

Premix
Emulsion, oil in water, wettable powder. 

Type

AI concn

Oil-in-water emulsion (EW)

14% (w/v)

Physical Properties
Molecular weight:314.4; Physical form:White to light tan, crystalline solid, with a slight sulfur odour ( tech.). Density:1.222 (20.5 °C); Melting point:54 °C; Flash point:189 °C (EEC A9); Vapour pressure:0.16 mPa (25 °C); Henry constant:1.26 × 10-4 Pa m3 mol-1 (25 °C, calc.); Partition coefficient(n-octanol and water):logP = 2.15 ( pH 7, 25 °C); pKa:Non-ionising pH 4-9; Solubility:In water 399 ppm ( pH 7, 25 °C). Soluble in dichloromethane and ethyl acetate (tech.).; Stability:Stable under normal storage conditions and at pH ×7.0; DT50 220 d ( pH 5), 49 h ( pH 7), 1 h ( pH 9).;
Toxicology
Oral:Acute oral LD50 for male rats 100-200, female rats 50-100, mice 54 mg tech./kg. Percutaneous:Acute percutaneous LD50 for rats >5000 mg/kg. Practically non-irritating to the skin; moderate eye irritant (rabbits). Not a skin sensitiser (guinea pigs). Inhalation: LC50 for rats 0.47 mg/l air. ADI:0.012 mg/kg b.w.
Environmental Profile
Ecotoxicology: 
Algae: EC50 (120 h) for Selenastrum capricornutum 27 mg/l; NOEC (120 h) 9.7 mg/l.Bees:Non-toxic; LD50 (96 h, oral) 41 µg/bee; (96 h, contact, for tech.) 27 µg/bee.Birds:Acute oral LD50 (single dose) for bobwhite quail 8 mg/kg. Dietary LC50 (8 d) for mallard ducks 292, quail 411 ppm.Daphnia: LC50 (48 h) 0.014 mg/l.Fish: LC50 (96 h) for bluegill sunfish 0.74, rainbow trout 0.53, sheepshead minnow 5.9 mg/l.Worms: LC50 (14 d) for earthworms 340 mg/kg; NOEC <95 mg/kg.Other aquatic spp.: LC50 (120 h) for mysid shrimp (Mysidopsis bahia) 190 µg/l.Other beneficial spp.:Poecilus cupreus and Aleochara bilineata: no toxic effects at 140 g/ha (lab.). Coccinella septempunctata: 87% effects at 140 g/ha (lab.); no toxic effects in semi-field tests. 

Environmental fate: 
Very rapidly metabolised by enzyme-catalysed hydrolysis and oxidation in all biological systems studied. Transient metabolites are either degraded further (soils and plants), or are eliminated (vertebrates). Animals:Hydrolysis, followed by decarbamoylation. Soil:DT50 2-6 h. Koc 150-369 (5 soils, 25 °C). Aqueous photolysis DT50 301 d ( pH c. 4). Metabolites found in leachates are not acutely toxic to DapPlant:Hydrolysis, followed by decarbamoylation.

Bobwhite quail

LD50 8 mg/kg

Rainbow trout [96 hrs]

LC50 0.53 mg/litre

Bluegill sunfish [96 hrs]

LC50 0.88 mg/litre

Bee [contact]

LD50 >160μg/bee

Fate in soil:
Triazamate is moderately mobile in soil. It has a half-life of less than one day.

Fate in aquatic systems:
The half-life of triazamate in aqueous solution varies from 1 hour to 10 days with decreasing pH.

Transport Information
Hazard Class:O (Obsolete as pesticide, not classified)

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