Trinexapac-ethyl
Title: Trinexapac-ethyl
CAS Registry Number: 95266-40-3
CAS Name: 4-(Cyclopropylhydroxymethylene)-3,5-dioxocyclohexanecarboxylic acid ethyl ester
Additional Names: cimectacarb
Manufacturers' Codes: CGA-163935
Trademarks: Palisade (Syngenta)
Molecular Formula: C13H16O5
Molecular Weight: 252.26
Percent Composition: C 61.90%, H 6.39%, O 31.71%
Literature References: Gibberellin biosynthesis inhibitor. Prepn: H.-G. Brunner, EP 126713; idem, US 4693745 (1984, 1987 both to Ciba-Geigy). Comprehensive description: E. Kerber et al., Brighton Crop Prot. Conf. - Weeds 1989, 83-88. Field trials in cereals and oilseed rape: J. Amrein et al., ibid. 89; in turfgrass: D. B. Vitolo et al., Proc. Plant Growth Regul. Soc. Am. 18, 136 (1991). Mechanism of action: R. Adams et al., Curr. Plant Sci. Biotechnol. Agric. 13, 818 (1992).
Properties: mp 36°. nD30 1.5350. pKa 4.7. Vapor pressure (20°): 1.6 ´ 10-3 Pa. Soly in water at 20° (g/l): 27 (pH 7); 5 (pH 5). Soly at 20° (g/ml): methanol >1; acetonitrile >1; cyclohexanone >1; isopropanol 0.9; n-octanol 0.18; hexane 0.035. Log P (n-octanol/water) pH 3: 2.1; pH 7: -0.4. LD50 in rats (mg/kg): 4460 orally; >4000 dermally (Kerber).
Melting point: mp 36°
pKa: pKa 4.7
Index of refraction: nD30 1.5350
Log P: Log P (n-octanol/water) pH 3: 2.1; pH 7: -0.4
Toxicity data: LD50 in rats (mg/kg): 4460 orally; >4000 dermally (Kerber)
Use: Plant growth regulator.

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