Common Name

Trifluralin

IUPAC Name

α,α,α-trifluoro-2,6-dinitro-N,N-dipropyl-p-toluidine

CAS Number

1582-09-8

Structural Formula

Physical and Chemical Characteristics

M.f. : C₁₃H₁₆F₃N₃O₄

Mol. Wt. : 335.3

Form : Yellow-orange crystals.

M.p.: 48.5-49 °C; (tech., 43-47.5 °C)

B.p. : 96-97 °C/24 Pa

V.p. : 6.1 mPa (25 °C) (EEC A4)

K_ow : logP = 4.83 (20 °C) (EEC A8)

Henry : 15 Pa m³ mol^-1 (calc.)

S.g./density: 1.36 (22 °C) (EEC A3)

Solubility:
In water 0.184 (pH 5), 0.221 (pH 7), 0.189 (pH 9) (all in mg/l) (EEC A6); tech. 0.343 (pH 5), 0.395 (pH 7), 0.383 (pH 9) (all in mg/l) (EEC A6). In acetone, chloroform, acetonitrile, toluene, ethyl acetate >1000, methanol 33-40, hexane 50-67 (all in g/l, 25 °C).

Stability:
Stable at 52 °C (highest storage temperature tested). Stable to hydrolysis at pH 3, 6 and 9 (52 °C). Decomposed by u.v. irradiation (E. Leitis & D. G. Crosby, J. Agric. Food Chem., 1974, 22, 842).

pKa: N/A

F.p.: 151 °C (closed cup); tech. 153 °C (open cup) (both Pensky-Martens)

Specification

Trifluralin content, % ≥95.0
N-nitroso-di-n-propylamine content, mg/kg ≤ 1