-
Physical Properties
Molecular weight:325.4; Physical form: Colourless, almost odourless solid. Density:1.181 (20 °C); Melting point:78-80 °C; Vapour pressure:0.66 mPa (25 °C, gas saturation method); Henry constant:6.5×10-3 Pa m3 mol-1 (20 °C, calc.); Partition coefficient(n-octanol and water):logP = 3.54 (20 °C); Solubility:In water 28.6 mg/l (20 °C). In acetone, methanol, ethyl acetate, 1,2-dichloroethane and xylene >250, n-heptane <20 (all in g/kg, 22 °C).; Stability:Hydrolysed in concentrated alkaline media. Stable in aqueous solutions at pH 4-9. DT50 86 d (pH 9, 25 °C). Thermally stable up to 250 °C under nitrogen. Stable to sunlight in aqueous solution. Soluble in most organic solvents except saturated hydrocarbons such as hexane; stable to hydrolysis at 25°C in acid and neutral media.
-
Toxicology
Oral:Acute oral LD50 for rats 4200, mice 680 mg/kg. Percutaneous:Acute percutaneous LD50 for rats >5000 mg/kg. Non-irritating to skin and eyes (rabbits). Non-sensitising to skin (guinea pigs). Inhalation:LC50 (4 h) for rats >10 mg/l air. ADI:(JMPR) 0.05 mg/kg b.w. [1987].
-
Environmental Profile
Ecotoxicology:
Algae:EC50(96 h) for Selenastrum capricornutum 2.4 mg/l.Bees:Non-toxic to bees; LD50>100 mg/bee.Birds:Acute oral LD50 for mallard ducks >4500, bobwhite quail >5000, chickens 4600 mg/kg. Dietary LC50 (5 d) for bobwhite quail and mallard ducks >5000 mg/kg Daphnia:LC50 (48 h) 0.59 mg/l.Fish: LC50 (96 h) for rainbow trout 3.75, goldfish 7.6, guppies 7.0, carp 6.0 mg/l.Worms:LC50(48 h) for earthworms 0.0053 mg/cm2. Environmental fate:
Animals:In rats, following oral administration, rapidly metabolised, and eliminated in the urine (23%) and faeces (75%) within 2 days.Soil:Slowly degraded by soil micro-organisms to various acidic metabolites. DT50in silt loam soil 77 d. Koc2728-7173 (3 soil types).Plant:Slowly metabolised to glycosides in plants. WATER SOLUBILITY: 28.6 mg/l at 20°C
-
Transport Information
Signal Word:CAUTION; Hazard Class:III (Slightly hazardous)