Pyrazosulfuron-ethyl
Product Parameters
| Specification: |
98%TC, 10%WP, 50%WP, 60%WDG, 150OD, 200OD |
| Appearance: |
White powder |
| Molecular Formula: |
C14H18N6O7S |
| Molecular Weight: |
414.39 g/mol |
| CAS NO.: |
93697-74-6 |
Physical & Chemical Properties
| Appearance: |
White powder |
| Molecular Weight: |
414.39 g/mol |
| Solubility: |
Water 14.5mg/l, acetone 31.7g/l, cloroform 234g/l, hexane 0.2g/l, methanol 0.7g/l. |
| Density: |
1.440 g/cm3 at 20 °C (68 °F) |
| Melting Point: |
181 - 182 °C |
| Boiling Point: |
no data available |
| Flash Point: |
> 170.00 °C (> 338.00 °F) - closed cup |
Toxicity
Acute toxicity
LD50 Oral - rat - > 5,000 mg/kg
LD50 Dermal - rat - > 2,000 mg/kg
Skin corrosion/irritation
Skin - rabbit - No skin irritation
Serious eye damage/eye irritation
Eyes - rabbit - No eye irritation
Mode of action
Systemic herbicide, absorbed by roots and/or leaves and translocated to the meristems.
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. Selectivity derives from rapid metabolism (demethylation of methoxy group) in the crop. Metabolic basis of selectivity in sulfonylureas reviewed (M. K. Koeppe & H. M. Brown, Agro-Food-Industry, 1995, 6, 9-14).
Application
Control of annual and perennial broad-leaved weeds and sedges, pre-or post-emergence in wet-sown and transplanted rice crops, at 15-30 g/ha.
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