Dipropalin
Weed control herbicide
From Wikipedia, the free encyclopedia
Dipropalin is a preëmergent dinitroaniline herbicide. It is currenctly not commercially used in western countries,[1] but may be available in China[2][unreliable source?] and used in India.[3] It has low acute toxicity.[1] It is used on turf.[1] Tests in the 1960s in the USA evaluated its performance as a trifluralin analog, where it scored the highest pre-emergent effectiveness amongst methyl-group analogs, though losing to several trifluoromethyls, such as trifluralin itself. Dipropalin's methyl group does see increased post-emergent activity, but no trifluralin analog was effective in this regard.[4] Dipropalin is chemically identical to trifluralin, except that trifluralin's trifluoromethyl group is switched for dipropalin's methyl.[5]
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| Names | |
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| Preferred IUPAC name
4-Methyl-2,6-dinitro-N,N-dipropylaniline | |
Other names
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| Identifiers | |
3D model (JSmol) |
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| ChemSpider | |
PubChem CID |
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| UNII | |
CompTox Dashboard (EPA) |
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| Properties | |
| C13H19N3O4 | |
| Molar mass | 281.312 g·mol−1 |
| Appearance | Yellow crystals[1] |
| Melting point | 42 °C (108 °F; 315 K) [citation needed] |
| Boiling point | 118 °C (244 °F; 391 K) |
| 0.3 g/L[citation needed] | |
| Hazards | |
| Lethal dose or concentration (LD, LC): | |
LC50 (median concentration) |
Over 3600 mg/kg (rat, oral)[1] |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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In another study, dipropalin scored better than trifluralin at controlling broadleaf weeds, but worse at grassy weeds, and much worse against sedges. Neither herbicide caused crop injury, even at 20 lb/ac. active ingredient applied,[6] and another study found dipropalin to be much less effective against bluegrass than trifluralin, and with 80% control of crabgrass, though many tested herbicides achieved better, including trifluralin at 98%.[5]