Mol. wt. 327.1 M.f. C13H8Cl2N2O4 Form Almost colourless crystals. M.p. 230 ºC V.p. <1 mPa (20 ºC) KOW logP = 1 (pH 9.6) Solubility In water 1.6 (pH 6.4), 110 (pH 9.1) (both in mg/l, 20 ºC). Soluble in common organic solvents such as ethanol and diethyl ether. Stability Hydrolysed in aqueous solution, DT50 (20 ºC) c. 7 d (pH 6.9), 18.8 d (pH 13.3). Stable to heat. Decomposes under u.v. irradiation. Hydrolysed by concentrated acid or alkali.
Mode of Action:
Molluscicide with respiratory and stomach action.
Oral Acute oral LD50 for rats >5000 mg tech./kg. Skin and eye Acute percutaneous LD50 for rats >2000 mg/kg (as WP70). Inhalation LC50 (4 × 1 h) 3630–8224 mg/m3 air (as WP70). Birds LD50 for mallard ducks >500 mg/kg (FAO Specifications). Fish LC50 (96 h) for golden orfe 0.1 mg/l. Daphnia LC50 (48 h) 0.2 mg/l. Algae ErC50 for Scenedesmus subspicatus 5 mg/l. Bees No significant mortality effects.
Product name: Niclosamide 25%EC
Light yellow to light brown stable homogeneous transparent liquid
Content of a.i.
Acidity (Calculated by H2SO4), %
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