CAS No 148477-71-8 , [3-(2,4-dichlorophenyl)-2-oxo-1-oxaspiro[4.5]dec-3-en-4-yl]
2,2-dimethylbutanoate

Title: Spirodiclofen
CAS Registry Number: 148477-71-8
CAS Name: 2,2-Dimethylbutanoic acid 3-(2,4-dichlorophenyl)-2-oxo-1-oxaspiro[4,5]dec-3-en-4-yl ester
Manufacturers' Codes: BAJ2740
Trademarks: Envidor (Bayer)
Molecular Formula: C21H24Cl2O4
Molecular Weight: 411.32
Percent Composition: C 61.32%, H 5.88%, Cl 17.24%, O 15.56%
Literature References: Tetronic acid acaricide for use in fruit, grapevines and nuts. Prepn: R. Fischer et al., DE 4216814; eidem, US 5262383 (both 1993 to Bayer). Comprehensive description of properties and activity: U. Wachendorff et al., BCPC Conf. - Pests Dis. 2000, 53. Greenhouse trials vs spider mites: R. Nauen et al., ibid. 453.
Properties: White powder, mp 101-108°. Log P (n-octanol/water): 5.8 (pH 4 at 20°). Vapor pressure (20°): 3 ′ 10-7 Pa. Soly in water (pH 4): 50 mg/l at 20°. LD50 in rats (mg/kg): >2500 orally; >2000 dermally (24 hr). LC50 (4 hr) in rats (mg/m3): >5000 by inhalation; LC50 (96 hr) in fish: >68 mg/l (Wachendorff).
Melting point: mp 101-108°
Log P: Log P (n-octanol/water): 5.8 (pH 4 at 20°)
Toxicity data: LD50 in rats (mg/kg): >2500 orally; >2000 dermally (24 hr); LC50 (4 hr) in rats (mg/m3): >5000 by inhalation; LC50 (96 hr) in fish: >68 mg/l (Wachendorff)
Use: Acaricide.