Sulfometuron-methyl
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Introduction: Sulfometuron-methyl is a broad-spectrum sulfonylurea herbicide. It is used for the control of annual and perennial grasses and broad leaved weeds in non-crop land. It also has forestry applications where it is used to control woody tree species. It is applied either post-emergent or pre-emergent. It works by blocking cell division in the active growing regions of stem and root tips (meristematic tissue).
Common name: Sulfometuron-methyl
Another name: SULFOMETURON METHYL; OUST; Caswell No. 561D; DPX-T5648; Aa 5648; DPX 5648; etc.
Chemical name: methyl 2-(4,6-dimethylpyrimidin-2-ylcarbamoylsulfamoyl)benzoate
Empirical formula: C15H16N4O5S
Structural formula:
Mol. Weight: 364.38 g/mol
CAS No.: 74222-97-2
Specifications
Leading Sulfometuron-methyl supplier
Sulfometuron-methyl 75% TC
Sulfometuron-methyl 10% SC
Sulfometuron-methyl 10% WP
Sulfometuron-methyl 75% WP
Sulfometuron-methyl 75% WDG
Packing:
BULK PACKING
Powder: 25kg/Bag, 25kg/Drum, 50kg/Drum etc.
Liquid: 200L/Drum, 20L/Drum, 10L/Drum etc.
SMALL PACKING
Powder: 1kg/Alu bag, 500g/Alu bag, 200g/Alu bag, 100g/Alu bag, 50g/Alu bag, 15g/Alu bag etc.
Liquid: 5L/Drum, 1L/Bottle, 500ml/Bottle, 250ml/Bottle, 100ml/Bottle, 50ml/Bottle etc.
Customerized packing label
Sulfometuron-methyl FAO standard
Professional registration
HAZARDS IDENTIFICATION
Hazard statement(s)
H319 (47.37%): Causes serious eye irritation.
H332 (47.37%): Harmful if inhaled.
H400 (100%): Very toxic to aquatic life.
H410 (75.79%): Very toxic to aquatic life with long lasting effects.
Precautionary statement(s)
P261: Do not breathe dust/fume/gas/mist/vapors/spray.
P264: Wash ... thoroughly after handling.
P271: Use only outdoors or in a well-ventilated area.
P273: Avoid release to the environment.
P280: Wear protective gloves/protective clothing/eye protection/face protection.
P304+P312: IF INHALED: Call a POISON CENTER/doctor/... if you feel unwell.
P304+P340: IF INHALED: Remove person to fresh air and keep comfortable for breathing.
P305+P351+P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses if present and easy to do - continue rinsing.
P312: Call a POISON CENTER or doctor/... if you feel unwell.
P337+P313: IF eye irritation persists: Get medical advice/attention.
P391: Collect spillage.
P501: Dispose of contents/container to an approved waste disposal plant.
Supplemental Hazard Statements: none.
MAMMALIAN TOXICOLOGY
Acute toxicity: 1) Acute oral LD50 for rats is >5000 a.i.mg/kg. 2) Acute dermal LD50 for rats is >2000 a.i.mg/kg. 3) Acute inhalation toxicity LC50 (4 h) for rats is >5 a.i.mg/L. 4) Skin irritation: Non-irritating to skin (rabbits). 5) Eye irritation: Slightly irritating to eyes (rabbits). 6) Skin sensitization for guinea pig: Non-sensitizing.
NOEL: (2 y) for rats is 25 mg/kg/day. Other Not carcinogenic. Not mutagenic.
ADI 0-0.02 mg/kg b.w.
Classification:
WHO Classification: U (Unlikely to present an acute hazard)
EC Risk Classification: Xi - Irritant: R36
US EPA Classification (formulation): IV (Caution - Not acutely toxic)
ECOTOXICOLOGY
Effect on birds: Acute oral LD50 for Mallard is >5000 a.i.mg/kg. Effect on fish: Acute LC50 (96 h) for Rainbow trout is >12.5 a.i.mg/l. Effects on aquatic invertebrates: Acute EC50 (48 h) for Daphnia magna is >12.5 a.i.mg/l. Effects on bees: contact acute 48 hour LD50 is >100 a.i.g/bee. Effects on earthworms: Acute 14 day LC50 is >1000 a.i.mg/kg.
ENVIRONMENTAL FATE
Animals Metabolised to hydroxylated sulfometuron-methyl. Soil/Environment Degraded by microbial action and by hydrolysis. DT50 in soil c. 4 w. Koc 85.
Usage: Sulfometuron-methyl was introduced by DuPon. Sulfometuron-methyl is used for the control of annual and perennial grasses and broad-leaved weeds in non-crop land and forestry.
Application: Biochemistry Branched chain amino acid synthesis (ALS or AHAS) inhibitor. Acts by inhibiting biosynthesis of the essential amino acids valine and isoleucine, hence stopping cell division and plant growth. Mode of action Broad-spectrum herbicide, absorbed rapidly by the leaves and roots, with translocation throughout the plant. Uses Control of annual and perennial grasses (especially Sorghum halepense) and broad-leaved weeds in non-crop land. Also used for selective weed control in Bermuda grass and certain other turf grasses; and in forestry to control woody tree species in pine trees. Applied either pre- or post- emergence; range of use rates is 26-420 g/ha.
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