Physical Properties
Molecular weight:301.3; Physical form:Colourless to white crystals. Density:1.23 (20 °C) ( OECD 109); Melting point:53-54 °C ( OECD 102); Flash point:c. 224 °C; Vapour pressure:8.67 ×10-4 mPa (25 °C) ( OECD 104); Henry constant:3.3 × 10-5 Pa m3 mol-1 ( calc.); Partition coefficient(n-octanol and water):logP = 4.07 (25 °C) ( OECD 107); Solubility:In water 7.9 mg/l ( pH 7.55-7.84, 25 °C). In ethanol 510, acetone 770, toluene 630, n-hexane 5.3, n-octanol 130 (all in g/l).; Stability:Stable to light. Stable to hydrolysis in aqueous solutions at pH 3, 7, and 9 at 50 °C.;
Toxicology
Oral:Acute oral LD
50
for rats >10 000 mg/ kg. Percutaneous:Acute percutaneous LD
50
for rats >2000 mg/ kg (occlusive). Non-irritating and non-sensitising to skin (maximisation test); not an eye irritant. Inhalation: LC
50
for rats >4400 mg/m
3
air. Phytotoxicity:Some varieties of pears, vines, citrus fruit and ornamentals may be injured.
Environmental Profile
Ecotoxicology:
Algae: EC
50
(96 h) for
Scenedesmus subspicatus
1.10 mg/l.Bees:Non-toxic to bees; oral LC
50
(24 h) >1000 ppm.Birds:Acute oral LD
50
for Japanese quail >7000 mg/kg. LC
50
(8 d) for bobwhite quail >25 000 ppm.Daphnia: LC
50
(48 h) 0.4 mg/l.Fish: LC
50
(96 h) for carp 10.3, rainbow trout 1.6 mg/l.Worms: LC
50
(14 d) for earthworms 850 mg/ kg soil.Other beneficial spp.:Under field conditions, fenoxycarb (formulated as 'Insegar 25 WP') is safe to predators such as Phytoseiidae, to endoparasitic Hymenoptera species, to certain predators such as predatory bugs, and it is semi-selective on certain predators such as coccinel
Environmental fate:
Animals:In rats, the major metabolic path is ring hydroxylation to form ethyl [2-[
p
-(
p
-hydroxyphenoxy)phenoxy]ethyl]carbamate.Soil:Low mobility in soil, no bioaccumulation. Relatively fast degradation in soil and water: DT
50
1.7-2.5 months (lab.), few to 31 days (field).Plant:Rapidly degraded in plants.WATER SOLUBILITY: 6 ppm
Transport Information
Signal Word:CAUTION; Hazard Class:III(Slightly hazardous)