ethaboxam
Fungicide
FRAC U5; thiazolecarboxamide
NOMENCLATURE
Common name ethaboxam (BSI, pa ISO)
IUPAC name (RS)-(a-cyano-2-thenyl)-4-ethyl-2-(ethylamino)-5-thiazolecarboxamide
Chemical Abstracts name N-(cyano-2-thienylmethyl)-4-ethyl-2-(ethylamino)-5-thiazolecarboxamide
CAS RN [162650-77-3] Development codes LGC-30473 (LG Chemical)
PHYSICAL CHEMISTRY
Mol. wt. 320.4 M.f. C14H16N4OS2 Form White crystalline powder. M.p. Decomp. 185 °C V.p. 8.1 ´ 10-2 mPa (25 °C) KOW logP = 2.89 (pH 7) Solubility In water 4.8 mg/l (20 °C).
COMMERCIALISATION
History Discovered and developed by LG Life Sciences Ltd (formerly LG Chem Ltd). Reported by C. S. Ra et al., Kor. J. Medicine Chem. 5, 72-75 (1995) and later by D. S. Kim et al., (Proc. 2002 BCPC. Conf. - Pests Dis., 1, 377-382). Manufacturers LG
APPLICATIONS
Biochemistry Inhibits mycelial growth and sporulation. Mode of action Preventative, curative, translaminar and systemic fungicide. Uses For control of Oomycetes, such as downy mildew in vines (Plasmopara viticola) and potato late blight (Phytophthora infestans), at 125-250 g/ha. Formulation types WP. Selected products: 'Guardian' (LG)
MAMMALIAN TOXICOLOGY
Oral Acute oral LD50 for male and female rats and mice >5000 mg/kg. Skin and eye Acute percutaneous LD50 for male and female rats >5000 mg/kg. Not an eye or skin irritant (rabbits); not a skin sensitiser (guinea pigs). Inhalation LC50 >4.89 mg/l Other No mutagenic potential in Ames and micronucleus tests. Not teratogenic (rats and rabbits).
ECOTOXICOLOGY
Birds Acute oral LD50 for bobwhite quail >5000 mg/kg. Fish LC50 (96 h) for bluegill >2.9, fathead minnow >4.6, rainbow trout 2.0 mg/l. Algae EC50 (120 h) for Selenastrum capricornutum >3.6 mg/l. Other aquatic spp. EC50 (48 h) for Moina macrocopa 0.33 mg/l. Bees LD50 for honeybees >100 mg/bee Worms LD50 >1000 ppm.
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