white crystal imazapic 98%TC 24%SL CAS No.:104098-48-8 Herbicide CAS NO.104098-48-8

imazethapyr

1.common name :imazethapyr (bsi, ansi, draft e-iso, (m) draft f-iso)

2.iupac name: (rs)-5-ethyl-2-(4-isopropyl-4-methyl-5-oxo-2-imidazolin-2-yl)nicotinic acid

3.chemical abstracts name: ( -2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1h-imidazol-2-yl]-5-ethyl-3-pyridinecarboxylic acid

4.cas rn :[81335-77-5]

5.development codes ac :263 499; cl 263 499 (both cyanamid)

6.mol. wt. 289.3 m.f. c₁₅h₁₉n₃o₃ form colourless crystals. m.p. 169-173 ºc b.p. decomp. 180 °c v.p. <0.013 mpa (60 ºc) k_ow logp = 1.04 (ph 5), 1.49 (ph 7), 1.20 (ph 9) (all 25 ºc) s.g./density 1.10-1.12 (21 °c) solubility in water 1.4 g/l (25 ºc). in acetone 48.2, methanol 105, toluene 5, dichloromethane 185, dimethyl sulfoxide 422, isopropanol 17, heptane 0.9 (all in g/l, 25 ºc). stability rapidly degraded in sunlight, dt₅₀ c. 3 d. pka pka₁ 2.1, pka₂ 3.9

7.mol. wt. :306.4

8.m.f. :c₁₅h₂₂n₄o₃

10.mammalian toxicology

oral acute oral ld₅₀ for male and female rats, and female mice >5000 mg/kg. skin and eye acute percutaneous ld₅₀ for rabbits >2000 mg/kg; mild skin and reversible eye irritant. inhalation lc₅₀ for rats 3.27 mg/l air (analytical), 4.21 mg/l (gravimetric). noel (2 y) for rats >10 000 mg/kg diet; (1 y) for dogs >10 000 mg/kg diet (highest dose tested). other non-mutagenic in the ames test. toxicity class who (a.i.) iii (table 5); epa (formulation) iii

11.ecotoxicology

birds acute oral ld₅₀ for bobwhite quail and mallard ducks >2150 mg/kg. fish lc₅₀ (96 h) for bluegill sunfish 420, rainbow trout 340, channel catfish 240 mg/l. daphnia lc₅₀ (48 h) <1000 mg/l. algae noel for selenastrum capricornutum 50 mg/l. other aquatic spp. i₅₀ for lemna gibba 4.38 mg/l. bees topical ld₅₀ for honeybees >0.1 mg/bee. worms i₅₀ >10 000 mg/k