Terbumeton

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Chemical Identification | General Product Information | Physical & Safety Data

Chemical Identification

Common Name

Terbumeton

中文通用名

特丁通

IUPAC

N²-tert-butyl-N⁴-ethyl-6-methoxy-1,3,5-triazine-2,4-diamine

CAS

N-(1,1-dimethylethyl)-N′-ethyl-6-methoxy-1,3,5-triazine-2,4-diamine

CAS No.

33693-04-8

Molecular Formula

C₁₀H₁₉N₅O

Molecular Structure

General Product Information

Category

Herbicides > Triazine herbicides

Activity

Herbicide

Premix

Wettable powder. Premix Parters: metalaxyl-M; TCMTB; thiophanate-methyl;

Physical & Safety Data

Physical Properties

Molecular weight:225.3; Physical form:Colourless crystals. Density:1.08 (20 °C); Melting point:123-124 °C; Vapour pressure:0.27 mPa (20 °C); Henry constant:4.68 × 10-4 Pa m3 mol-1 ( calc.); Partition coefficient(n-octanol and water):logP = 3.04; Solubility:In water 130 mg/l (20 °C). In acetone 130, toluene 110, methanol 220, dichloromethane 360, n-octanol 90 (all in g/l, 20 °C).; Stability:Stable in neutral, weakly acidic and weakly alkaline media. Hydrolysed by strong acids and alkalis, especially at higher temperatures, with the formation of hydroxytriazine;

Toxicology

Oral:Acute oral LD₅₀ for rats 651, mice 2343 mg/kg. Percutaneous:Acute percutaneous LD₅₀ for rats >3170 mg/kg. Non-irritating to skin (rats); slightly irritating to eyes (rabbits). Inhalation: LC₅₀ (4 h) for rats >10 mg/l. Phytotoxicity:Should not be applied to the vine variety Airen. May be phytotoxic to most annual plants, by drift, etc. ADI:( JMPR) 0.0002 mg/kg b.w. [1989].

Environmental Profile

Ecotoxicology:
Algae: LC₅₀ 0.009 mg/l.Bees:Non-toxic to bees.Daphnia: LC₅₀ (48 h) 40 mg/l.Fish:LC₅₀ (96 h) for rainbow trout 14, channel catfish 10, bluegill sunfish 30, crucian carp 30 mg/l.

Environmental fate:
Animals:In mammals, following oral administration, terbumeton is rapidly absorbed. More than 95% is eliminated within 96 hours, predominantly in the urine, with c. 25% in the faeces.Soil:In soil, terbumeton undergoes microbial demethylation to the hydroxytriazine. There is uncertainty about subsequent degradation. DT₅₀ in soil c. 300 d. Moderately mobile under lab. conditions, but only slightly mobile uPlant:Demethoxylation, dealkylation (primarily de-ethylation) and conjugation are the main metabolic steps in crop plants.

Transport Information

Hazard Class:II(Moderately hazardous)