Бенфурезат

Description

Benfuresate is a herbicide from the group of benzofuran derivatives, used primarily in rice growing under the trade name Zerbex. Refers to inhibitors of the biosynthesis of long-chain fatty acids (VLCFA) in plant cells: disruption of the synthesis of these fatty acids blocks the formation of cell membranes and leads to characteristic growth disorders - fusion of seedling organs and deformation of the growing point in sensitive weeds.

Basic Attributes

• CAS No.: 68505-69-1
• Chemical formula: C12H16O4S
• Molecular Weight: 256.32
• Exact weight: 256.32
• EU number: 270-925-4
• UNII: 5E3V59Y698
• DSSTox ID: DTXSID8058160
• PSA Specifications: 61
• XLogP3: 3.16590

Physico-chemical characteristics

• Density: 1.223 g/cm3
• Melting point: 30.1 °C
• Boiling point: 386.5 °C at 760 mm Hg. Art.
• Flash point: 187.6 °C
• Refractive index: 1.53
• Storage conditions: 0-6 °C

Mechanism of action and scope of application

The active ingredient of selective herbicides for rice fields, which suppresses the biosynthesis of long-chain fatty acids (VLCFA) in the cells of sensitive weeds. The deficiency of these fatty acids disrupts the construction of the waxy layers of the cuticle and cell membranes, slows down cell division at growth points and causes characteristic fusion and deformation of the organs of the seedlings. Moderate lipophilicity (XLogP3 3.16590) and a relatively small polar surface (PSA 61) of the molecule facilitate the penetration of the substance through the lipid membranes of the plant cell.

Safety Information

• Transport codes: does not fall under the transport classification of dangerous goods (NONH) for all modes of transport
• WGK Germany: 1
• Hazard class code: 52/53
• Safety instructions: 61
• RTECS number: KI7372000

Storage and transportation

Store at 0-6 °C, dry, cool warehouse. Water hazard class WGK Germany 1 indicates a low hazard for water bodies according to the German classification, while code 52/53 warns of harm to the aquatic environment during accumulation. There is no data on solubility, vapor pressure and LD50 values ​​in the dump, no additional information was found - these items are not filled in. The absence of a transport classification of dangerous goods (NONH) means that no additional UN marking is required during transport, which simplifies the logistics of the technical product.

More information

The substance belongs to derivatives of ethanesulfonic acid with a benzofuran core - 2,3-dihydro-3,3-dimethyl-5-benzofuranyl ether. This structure is typical of herbicides that act on the lipid metabolism of the plant cell, and not on photosynthesis or amino acid synthesis, like most more common classes of herbicides. The technical product is shipped without the status of dangerous goods, which simplifies the logistics of deliveries to manufacturers of formulations.