| Chemical Abstract Number (CAS #) | 741582 |
|---|---|
| Synonyms | Bensulide | Phosphorodithioic acid, O,O-bis(1-methylethyl) S-[2-[(phenylsulfonyl)amino]ethyl]ester | Betasan | Disan | Prefar | SAP |
| Analytical Method | EPA Method 636 |
| Molecular Formula | C14H24NO4PS3 |
| Use | SELECTIVE PREEMERGENCE HERBICIDE For the control of undesirable grasses in lawns and broadleaf weeds. Seasonal control of carbgrass, annual bluegrass in grass dichondra lawns. Prefar is for crop use in carrots, cole crops. BETASAN IS REGISTERED FOR CONTROL OF REDROOT, PIGWEED, WATERGRASS, LAMBSQUARTERS, SHEPHERDSPURSE, GOOSEGRASS, AND DEADNETTLE IN GRASS & DICHONDRA LAWNS. Pre-emergence control of annual grasses and broad-leaved weeds in established turf, dichonda, brassicas, cucurbits, watermelons, cotton, lettuce, tomatoes, carrots, capsicums, rice, and herbage seed crops. |
| Apparent Color | VISCOUS AMBER LIQUID ABOVE 34.4 DEG C, SOLID BELOW ; COLORLESS LIQUID OR WHITE CRYSTALLINE SOLID |
| Melting Point | 34.4 DEG C |
| Molecular Weight | 397.52 |
| Density | 1.23 @ 20 DEG C/20 DEG C |
| Environmental Fate | TERRESTRIAL FATE: EFFECTS PERSIST FOR 0.33-1.0 YR ACCORDING TO RATE OF APPLICATION. BENSULIDE IS INACTIVATED IN SOILS CONTAINING HIGH AMOUNTS OF ORGANIC MATTER. LEACHES VERY LITTLE IN SAND, CLAY OR ORGANIC SOILS. THE HALF LIFE IN MOIST LOAM SOIL @ 70-80 DEG F WAS 4 MO. IN A MOIST LOAMY SAND SOIL @ 70-80 DEG F THE HALF-LIFE WAS 6 MO. COMPLETE DISSIPATION OF BENSULIDE RESIDUES TOOK 8-10 MO @ APPLICATION RATE OF 5 LB/ACRE. DOUBLING APPLICATION RATE RESULTED IN PERSISTENCE OF 2 MO LONGER. DEGRADATION WAS INCR BY INCR SOIL TEMP & ORG MATTER CONTENT BUT DECR WITH INCR PH. |
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