Agricultural chemicals
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Desmedipham
Cas No. ：13684-56-5
Pure product is colorless crystal. Melting point 120°C.
For use after sugar beet seedlings to control broadleaf weeds
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Cycloxydim
Cas No. ：101205-02-1Appearance is yellow solid. m.p. 37~39℃. Relative density 1.12 (20℃), vapor pressure 1×10-5Pa (20℃), soluble in many organic solvents, insoluble in water. Distribution coefficient 229. unstable above 30℃.
Cyclohexenone selective post-emergence herbicide, mitosis inhibitor. Used in cotton, rape, soybean, potato and vegetables and other broad-leaved crops to prevent and eliminate annual and perennial grass undergraduate weeds such as wild oats, look at the maiden, ryegrass, etc., the recommended dosage of annual grass weeds is 0.9-2.4g active ingredient/100m2. the recommended dosage of perennial grass weeds is 2-5g active ingredient/100m2.
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Clopyralid
Cas No. :1702-17-6
Density 1.4313 (rough estimate),
Refractive index 1.6100 (estimate),
Acidity coefficient (pKa) 2.02±0.25 (Predicted),
Water solubility 1.0 g/L
For the control of broadleaf weeds in rape fields
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CLOMAZONE 96%
Cas No. :81777-89-1This water is light brown viscous liquid. m.p. 25 ℃, relative density 1.192 (20 ℃), vapor pressure 19.2 × 10-3Pa (25 ℃). Soluble in acetone, chloroform, methanol, acetonitrile, cyclohexanone, dichloromethane, dimethylformamide, toluene, heptane and other organic solvents;
Isoxaflutole is a selective pre-emergence treatment, and the application period should be mastered in the pre-emergence soil closure treatment after sowing. It is mainly used for the control of broadleaf weeds and grass weeds in soybean fields, and can also be used in cassava, corn, oilseed rape, sugar cane and tobacco fields.
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Clodinafop-propargyl
Cas No. 105512-06-9Appearance Off-white to yellow solid.
Post-emergence stem and leaf treatment systemic wheat herbicide, against wild oats, look at the wheat, hard grass, grass, stick grass, with low temperature resistance, rainfall resistance, the use of a wide range of appropriate period, and on the wheat and stubble crop safety characteristics.
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Clethodim
Cas No. :99129-21-2
The original drug is amber transparent liquid. Relative density 1.15(20℃ ), vapor pressure 1.3×10-5 Pa (20℃ ), soluble in many organic solvents, unstable to light.
Selective herbicide can control annual and perennial grass weeds
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Bromoxynil octanoate
Cas No. ：1689-99-2/1689-47-0
Light yellow low volatile waxy solid, melting point 45 ～ 46℃ . Sublimation at 90℃ /13.33Pa, vapor pressure is 1.9×10-1mPa(25℃ ). Industrial product has slight odor of oil ester, melts above 40 ～ 44℃ . Insoluble in water. solubility at 25℃ : 3mg/L in water, 800g/L in chloroform, 700g/L in xylene, dimethylformamide, 620g/L in ethyl ester, 550g/L in cyclohexanone, 500g/L in carbon tetrachloride, 120g/L in isopropanol, 100g/L in acetone, methanol, ethanol. stable to light and under melting point, hydrolyzed to bromobenzonitrile at pH>9.
It is mainly used for post_x005f emergence control of broadleaf weeds in grasses, flax, garlic, corn, onions, sorghum and newly sown sod. Mixed with other herbicides, it can expand the herbicidal spectrum.
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Bispyribac-sodium
Cas No. ：125401-92-5/125401-75-4Pure product is white powder solid, m.p. 223-224℃ , vapor pressure <5.05×10-9Pa (25℃ ), solubility at 25℃ : methanol 26.3g/L, acetone 0.043g/L, water 73.3g/L, half-life in water is 1 year (pH7-9), hot storage at 55℃ for 14d without decomposition, pKa3.05.
used to control grass weeds such as barnyard grass and broadleaf weeds in paddy field. It can be used in seedling field, direct seeding field, small seedling transplanting fi eld and seedling throwing field
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Bentazone
Cas No. ：25057-89-0
Pure product is white cry stalline solid. m.p. 138℃ , decomposition temperature 200℃ , vapor pressure <1.33×10-5Pa(20℃ ), relative density 1.22. solubility at 20℃ : acetone 150.7%, ethanol 0.02%, water 0.05%. Stable to acid, alkali and light.
It is applicable to soybean, rice, wheat, peanut, grassland, tea garden, sweet potato, etc., and is used to control sand grass and broadleaf weeds.
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Bensulfuron-Methyl (Patented-No-Supply)
Cas No. ：83055-99-6Pure product is white odorless solid, m.p. 185 ～ 188℃ , vapor pressure 1.733×10-3Pa(20℃). Solubility: dichloromethane 11720mg/L, acetonitrile 5380mg/L, xylene 280mg/L, ethyl acetate 1660mg/L, acetone 1380mg/L, methanol 990mg/L, hexane 3.1mg/L, water 1200mg/L. Distribution coeffi cient is 4.1. Stable in slightly basic (pH=8) aqueous solution, slow decomposition in acidic solution. The half-life is 11d at pH 5 and 143d at pH 7. The original drug is slightly light yellow.
Used to control annual and perennial broad-leaved weeds and sedges in rice seedling fields, direct seeding fields and transplanting fields
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Benfluralin
Cas No. ：1861-40-1
The melting point of flufenacet is 65 ～ 66.5℃ , vapor pressure is 0.533×10-4Pa(25℃ ), slightly soluble in water(70mg/l at 25℃ ), easily soluble in organic solvent.
Fluchlor can be used as a herbicide, weeding before bud, and controlling annual narrow-leaved and broad-leaved weeds.
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Atrazine
Cas No. ：1912-24-9Appearance white crystal powder. Melting point 175.8 ℃, boiling point 205.0 ℃ (101 kPa), vapor pressure 3.85 × 10-2 mPa (25 ℃), octanol / water partition coefficient Kow logP 2.5 (pH 2, 20 ℃), Henry’s constant 1.5 × 10-4 Pa – m3 /mol (calculated value), relative density 1.187, dissociation constant pKa 1.6 (very weak base), flash point Non-flammable. Flash point Non-flammable. Solubility: water 33 mg/L (pH 7, 22 ℃); acetone 31, dichloromethane 28, ethyl acetate 24, ethanol 15, octanol 8.7, toluene 4.0 and hexane 0.11 (g/L, 25 ℃). Stability: Stable for 2 years in unopened original packaging (25±5 °C). Relatively stable in neutral, weakly acidic and weakly alkaline media. Rapidly hydrolyzed to hydroxyl derivatives in strong acids, strong bases or 70 neutral environments. Abiotic hydrolysis, degradation half-life DT50 (25 °C) 33.9 d (pH 5), 365 d (pH 7), 365 d (pH 9).
Preventing and removing annual weeds in spring corn field and summer corn field, the dosage is 1,485~1,755 and 1,215~1,485 g/hm2 soil spray, respectively. To prevent and control annual weeds in rice transplanting field, the dosage is 73.8~98.4 g/hm2 soil method.