FLUTOLANIL Property

Melting point:

108° (Araki, Yabutani); mp 104-105° (Araki, 1985)

Boiling point:

339.1±42.0 °C(Predicted)

Density 

1.2463 (estimate)

vapor pressure 

6.5 x 10^-6 Pa (25 °C)

storage temp. 

0-6°C

solubility 

Chloroform (Slightly), Methanol (Slightly)

form 

Solid

Water Solubility 

6.53 mg l^-1 (20 °C)

pka

12.44±0.70(Predicted)

color 

White to Pale Orange

LogP

3.700

EPA Substance Registry System

Flutolanil (66332-96-5)

Safety

RTECS 

CV5581320

Hazardous Substances Data

66332-96-5(Hazardous Substances Data)

Toxicity

LD50 in male and female rats, male and female mice (mg/kg): >10,000, >10,000 orally; in male and female rats (mg/kg): >5000 dermally (Araki)

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H410Very toxic to aquatic life with long lasting effects

Precautionary statements

P273Avoid release to the environment.

P391Collect spillage. Hazardous to the aquatic environment

P501Dispose of contents/container to..…

FLUTOLANIL Chemical Properties,Usage,Production

Uses

Flutolanil is used to control Basidiomycetes diseases in rice, cereals, sugar beet and other crops.

Uses

Flutolanil is a fungicide that has been used for controlling brown patch on creeping bentgrass fairways.

Uses

Agricultural fungicide.

Definition

ChEBI: Flutolanil is a member of the class of benzamides, obtained by formal condensation of the carboxy group of 2-(trifluoromethyl)benzoic acid with the amino group of 3-(ispropyloxy)aniline. A fungicide used to control a range of pathogens especially Rhizoctonia spp. on rice, turf and other crops. It has a role as an EC 1.3.5.1 [succinate dehydrogenase (quinone)] inhibitor and an antifungal agrochemical. It is a member of benzamides, an aromatic ether, a member of (trifluoromethyl)benzenes and a benzanilide fungicide.

Safety Profile

Low toxicity by ingestion, skincontact, intraperitoneal, and subcutaneous routes. Whenheated to decomposition it emits toxic vapors of NOx andF??.

Metabolic pathway

Flutolanil is an analogue of mepronil in which the methyl group is replaced by trifluoromethyl. Both compounds have systemic activity. This change in structure should render flutolanil more biostable by hindering hydrolysis and removing the option of methyl hydroxylation and further oxidation. This seems to be borne out in practice in that most of the metabolism of flutolanil occurs via O-dealkylation and aryl hydroxylation. Hydrolysis has not been detected.

Degradation

Flutolanil is a stable arylamide with no particularly weak link in its comparatively simple chemistry. It is stable over the pH range 3-11 and it is stable to heat (PM). It is stable in sunlight (PM) but it was slowly degraded in 50% aqueous ethanol solution irradiated with a high pressure mercury lamp whilst bubbling oxygen through the solution (Tsao and Eto, 1991). The study was conducted using non-radiolabelled compound. No degradation occurred in the absence of oxygen. Even under these conditions, the addition of photosensitisers was required to give a reasonable amount of breakdown. With 5% acetone in the solution, 20% degradation was obtained in 8 hours. Almost no decomposition occurred on a glass surface in 8 hours unless a sensitiser (e.g. benzophenone) was added. This gave 40% decomposition.
The products in solution and on surfaces were different, as shown in Scheme 1. The major product (80%) in solution was 2-(trifluoromethyl)- benzamide (2). The benzoic acid (3) was identified as a minor product. The N-ethoxycarbonyl derivative (4) was due to reaction with the solvent. Amide bond cleavage was postulated to occur via oxidation in the aniline ring (Tsao and Eto, 1991; Yumita et al., 1984). The resulting phenolic products and anilines were converted into unidentified polar polymers.
No product 2 was obtained by irradiation on a glass surface (Tsao and Eto, 1991). Under these conditions 3'-hydroxy-2-(trifluoromethyl)benzanilide (5), i.e. dealkylated flutolanil, and a rearrangement product (6) were the main products. Flutolanil is therefore an extremely stable compound which undergoes slow photo-oxidation rather than aqueous photolysis.