Pefurazoate Property

Melting point:

25°C

Boiling point:

480.31°C (rough estimate)

Density 

d420 1.152

vapor pressure 

0.648 x l0^-4 Pa (23 °C)

refractive index 

nD24.4 1.5140

pka

3.8 (base)

Water Solubility 

443 mg l^-1 (25 °C)

Safety

Toxicity

LD50 in male, female rats, male, female mice (mg/kg): 981, 1051, 1299, 946 orally; in rats (mg/kg): >2000 dermally; LC50 in rats (mg/m3): >3450 by inhalation; LC50 (48 hr) in carp, rainbow trout, bluegill sunfish (ppm): 16.9, 4.0, 12.0 (Takenaka, 1990)

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Danger

Hazard statements

H302Harmful if swallowed

H360May damage fertility or the unborn child

H371May cause damage to organs

H373May cause damage to organs through prolonged or repeated exposure

Precautionary statements

P260Do not breathe dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

P309+P311IF exposed or if you feel unwell: call a POISON CENTER or doctor/physician.

P314Get medical advice/attention if you feel unwell.

P330Rinse mouth.

P405Store locked up.

P501Dispose of contents/container to..…

Pefurazoate Chemical Properties,Usage,Production

Uses

Pefurazoate is used to control seed-borne fungal diseases, particularly Fusuriurn monuliniforme (Bakanae disease), Pyriculuriu ovyzae (rice blast) and Cuchliobolus rniyubeunus (brown spot) on rice plants. It also controls rice seedling blight caused by soil-borne pathogens (Trichoderme viride and Fusurium spp.) in nursery box cultivation, and other fungal pathogens on seeds of wheat, barley and flower bulbs.

Uses

Fungicide.

Definition

ChEBI: Pent-4-en-1-yl 2-[(2-furylmethyl)(imidazol-1-ylcarbonyl)amino]butanoate is a carboxylic ester obtained by formal condensation of the carboxy group of 2-[(2-furylmethyl)(imidazol-1-ylcarbonyl)amino]butanoic acid with the hydroxy group of pent-4-en-1-ol. It is a N-acylimidazole, a member of furans, a carboxylic ester and an olefinic compound.

Origin

This rice fungicide has been introduced by Showa Denko for the treatment of rice seedlings in Japan. It is based on a racemic homoalanine pentenyl ester backbone.

Safety Profile

Moderately toxic by ingestion, inhalation, and skin contact routes. Experimental reproductive effects.

Metabolic pathway

Pefurazoate is readily degraded in soils, plants and mammals and the molecule is susceptible to attack by enzymes at several sites. Metabolic cleavage of the molecule gives simpler fragments formed by loss of the imidazole ring.

Degradation

Pefurazoate is stable in acidic media and slightly unstable in alkaline media. It is stable to sunlight and decomposes only to the extent of about 1% after 90 days at 40 °C.