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Fungicides
Lactofen
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Lactofen

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Lactofen
Lactofen.svg
Names
IUPAC name
Ethyl O-[5-(2-chloro-α,α,α-trifluoro-p-tolyloxy)-2-nitrobenzoyl]-DL-lactate
Other names
2-Ethoxy-1-methyl-2-oxoethyl 5-[2-chloro-4-(trifluoromethyl)phenoxy]-2-nitrobenzoate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.111.278
PubChem CID
UNII
  • InChI=1S/C19H15ClF3NO7/c1-3-29-17(25)10(2)30-18(26)13-9-12(5-6-15(13)24(27)28)31-16-7-4-11(8-14(16)20)19(21,22)23/h4-10H,3H2,1-2H3 ☒N
    Key: CONWAEURSVPLRM-UHFFFAOYSA-N ☒N
  • InChI=1/C19H15ClF3NO7/c1-3-29-17(25)10(2)30-18(26)13-9-12(5-6-15(13)24(27)28)31-16-7-4-11(8-14(16)20)19(21,22)23/h4-10H,3H2,1-2H3
    Key: CONWAEURSVPLRM-UHFFFAOYAB
  • CCOC(=O)C(C)OC(=O)c1cc(ccc1[N+](=O)[O-])Oc2ccc(cc2Cl)C(F)(F)F
Properties
C19H15ClF3NO7
Molar mass 461.77 g·mol−1
Appearance White crystalline solid
Melting point 43.9 to 45.5 °C (111.0 to 113.9 °F; 317.0 to 318.6 K)
0.1 mg/L @ 20 degrees C
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
☒N verify (what is checkY☒N ?)

Lactofen is a complex ester of acifluorfen and is a nitrophenyl ether selective herbicide and fungicide. It is used in postemergence applications to certain crops which are resistant to its action. The name "Lactofen" is approved by the American National Standards Institute and the Weed Science Society of America, and is also approved in China (乳氟禾草灵).

Lactofen is applied as a foliar spray and is commonly used to control broadleaved weeds in soybean, cereals, potatoes and peanuts. It may be combined with oil or fertilizer adjuvants and surfactants. Some formulations include solvents such as xylenes and cumene. It is also used as a fungicide for Sclerotinia white molds on soybean.

Lactofen is available in solid form or as an emulsifiable concentrate under the trade name COBRA.

Toxicology

Lactofen is slightly to non-toxic to humans when ingested or inhaled. It can cause skin irritation including reddening, swelling and possibly corrosive burns. It is a severe eye irritant and can cause permanent damage to eyes when there is sufficient exposure.

It was found to be practically non-toxic to the species of bird that were studied. Toxicity to fish and other aquatic organisms varied and it was eliminated in fish within fourteen days. It is of low toxicity to bees.

Lactofen has a very low solubility in water and is not expected to contaminate surface waters. It binds tightly to soil and is then broken down in between one and seven days.

External links

  • Lactofen in the Pesticide Properties DataBase (PPDB)

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