Propanil

Common name propanil

IUPAC name 3',4'-dichloropropionanilide 

Chemical Abstracts name N-(3,4-dichlorophenyl)propanamide 

CAS RN [709-98-8] 

Composition Tech. is 97% nominal. 

Mol. wt. 218.1 

M.f. C9H9Cl2NO 

Form Colourless, odourless crystals; (tech. is a medium to dark grey, crystalline solid).  M.p. 91.5 癈 

B.p. 351 癈 

V.p. 0.02 mPa (20 篊); 0.05 mPa (25 篊) 

KOW logP = 3.3 (20 癈) 

Henry 1.7 ´ 10-4 Pa m3 mol-1 

S.g./density 1.41 g/cm3 (22 篊) 

Solubility In water 130 mg/l (20 篊). In isopropanol, dichloromethane >200, toluene 50-100, hexane <1 (all in g/l, 20 篊). In benzene 7 ´ 104, acetone 1.7 ´ 106, ethanol 1.1 ´ 106 (all in ppm, 25 篊). 

Mode of action

Selective contact herbicide with a short duration of activity. 

Uses

Contact herbicide used post-emergence in rice