| Chemical Abstract Number (CAS #) |
1982496
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| Synonyms | Siduron |
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Urea, N-(2-methylcyclohexyl)-N'-phenyl- | Tupersan | 1-(2-Methylcyclohexyl)-3-phenylurea |
| Analytical Methods |
EPA Method 553 |
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EPA Method 632 |
| Molecular Formula | C14H20N2O |
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| Use | HERBICIDE.
USED FOR PREEMERGENCE CONTROL OF ANNUAL WEED GRASSES, SUCH AS
CRABGRASS, FOXTAIL, AND BARNYARDGRASS, IN NEWLY SEEDED OR
ESTABLISHED PLANTINGS OF BLUEGRASS, FESCUE, REDTOP, SMOOTH BROME,
PERENNIAL RYEGRASS, ORCHARD GRASS.
SELECTIVE HERBICIDE USED PREEMERGENCE AGAINST DIGITARIA SPECIES
BUT TOLERATED BY CEREALS, TURF SPECIES & MANY BROAD-LEAVED CROP
PLANTS.
Selectively controls certain germinating annual weed grasses in newly seeded or established
plantings of zoysia, and the following strains of bentgrass: PennCross, Seaside, Highland,
Astoria, Nimisila, C-1, C-7 and C-19. Should not be used on other bentgrass strains nor on
bermudagrass.
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| Apparent Color | WHITE CRYSTALS; COLORLESS CRYSTALS
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| Odor | ODORLESS
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| Melting Point | 133-138 DEG C
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| Molecular Weight | 232.36
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| Density | 1.08 at 25 deg C/25 deg C
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| Sensitivity Data | MAY IRRITATE EYES, NOSE, THROAT, & SKIN.
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| Environmental Fate | TERRESTRIAL FATE: IN STUDIES OVER 3 YR PERIOD IN A TEMPERATE
CLIMATE UNDER AN ANNUAL RAINFALL OF ABOUT 45 INCHES, THERE HAS BEEN
NO EVIDENCE OF RESIDUAL CHEMICAL IN THE SOIL AFTER 1 YR, EVEN WITH
APPLICATIONS MUCH IN EXCESS OF THOSE REQUIRED FOR WEED CONTROL. 428]
TERRESTRIAL FATE: ADSORPTION INCR AS CLAY CONTENT &/OR ORG MATTER
CONTENT OF SOIL INCR; CLAYS OF HIGH EXCHANGE CAPACITY ADSORB MORE
THAN THOSE OF LOW EXCHANGE CAPACITY. THE AMOUNT ADSORBED ON
KEYPORT SILT LOAM IN EQUILIBRIUM WITH 1 PPM IN SOIL SOLN AT 22.5 C IS 2.5
PPM. SIDURON IS VERY RESISTANT TO LEACHING. MOVEMENT IS LEAST IN SOILS
HIGH IN CLAY &/OR ORGANIC MATTER; GREATEST IN SAND.
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