Sulfentrazone standard
SULFENTRAZONE
CAS: 122836-35-5
Molecular Formula: C11H10Cl2F2N4O3S
Sulfentrazone standard - Names and Identifiers
Sulfentrazone standard - Physico-chemical Properties
| Molecular Formula | C11H10Cl2F2N4O3S |
| Molar Mass | 387.19 |
| Density | 1.21 g/cm3 |
| Melting Point | 75-78° |
| Boling Point | 468.2±55.0 °C(Predicted) |
| Flash Point | 237°C |
| Solubility | Chloroform (Slightly), Methanol (Slightly) |
| Vapor Presure | 6.1E-09mmHg at 25°C |
| Appearance | Solid |
| Color | Pale Brown to Beige |
| pKa | 6.56(at 25℃) |
| Storage Condition | 0-6°C |
| Refractive Index | 1.646 |
| Physical and Chemical Properties | Storage Conditions: 0-6 ℃ |
| In vitro study | Sulfentrazone persists in soil and has residual activity beyond the season of application. Plants emerging from soil treated with Sulfentrazone absorb the product through the root system and tolerant plants rapidly metabolize Sulfentrazone, whereas sensitive plants die shortly after exposure to light. |
Sulfentrazone standard - Risk and Safety
| UN IDs | UN3077 (solid); UN3082(liquid) |
| HS Code | 29350090 |
| Toxicity | LD50 orally in rats: 2855 mg/kg; dermally in rabbits: >2000 mg/kg; LC50 (96 hr) in bluegill sunfish, rainbow trout (ppm): 92.8, >130 (Van Saun) |
Sulfentrazone standard - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| toxicity | acute oral LD502855mg/kg in rats, acute percutaneous LD50>2000 mg/kg in rabbits, and acute inhalation of LC504.14 mg/L in rats. It has no irritation to rabbit eyes, slight irritation to skin, but no sensitization. Ames test was negative, mouse lymphoma and in vivo mouse micronucleus test were negative. Rainbow trout LC50>130mg/L (96h), Daphnia LC5060.4 mg/L (48h). Mouth LD50 of wild ducks> 2250mg/kg. |
| biological activity | Sulfentrazone is a phenyltriazolinone herbicide used to control certain broad-leaved and gramineous weeds. Sulfentrazone inhibits protoporphyrinogen oxidase, causing lipid cell membrane rupture. |
| use | triazolinone herbicides, protoporphyrinogen oxidase inhibitor. By inhibiting the protoporphyrinogen oxidase in the process of chlorophyll biosynthesis and destroying the cell membrane, the leaves quickly dry up and die. It is suitable for annual broad-leaved weeds, gramineous weeds and sedge in soybean, corn, sorghum, peanut, sunflower and other crops, such as morning glory, amaranth, Chenopodium, mandala, Binzhou Polygonum, Matang, Setaria, Xanthium, oxanthium, oil sedge, veal, etc. It is effective for weeds such as morning glory, quinoa, Xanthium sibiricum, and Fragrant aconite that are currently more difficult to treat. For example, after soybean sowing, soil treatment before seedling or weeding after seedling, a dose of 350~400g of active ingredient/hm2 is used, 70~100g of 38.6% gel suspension is used every 667m2 before soybean sowing, 50kg of water is evenly sprayed on the soil surface, or 40~50kg of fine fluvo-aquic soil is mixed on the soil surface. |
| production method | 2, 4-dichlorophenylhydrazine hydrochloride reacts with pyruvic acid to generate 2,4-dichloroacetone phenylhydrazone; then in the presence of triethylamine It refluxes with diphenylphosphoryl azide for 2 hours to prepare 1-(2, 4-dichlorophenyl)-3-methyl -1,2, 4-Triaminine-5-one; then using tetrahydrofuran as a solvent, in the presence of potassium hydroxide and tert-butyl ammonium bromide, difluoromonochloromethane is introduced to obtain 1-(2, 4-dichlorophenyl)-3-methyl -4-difluoromethyl -1,2, 4-triazolin-5-one; then nitration to obtain 1-(2, 4-Dichloro-5-nitrophenyl) -3-methyl-4-difluoromethyl-1, 2, 4-triazole-5-one; reduction to obtain 1-(5-amino-2, 4-dichlorophenyl) -3-methyl-4-difluoromethyl-1, 2, 4-triazole device-5-one; then in the presence of triethylamine, using dichloromethane as the flux, methylsulfonyl chloride is added dropwise at low temperature, and the temperature is naturally raised to room temperature and stirred for 16h to obtain 1-{2,4-dichloro-5-[bis-(N-methylsulfonyl) amino] phenyl}-3-methyl -4-difluoromethyl -1,2, 4-triazolin-5-one. Dissolve 0.8g (0.002mol) of the above product in 10mL of ethanol, then add 0.14g of sodium hydroxide and 0.3mL of water, add 100mL of water after 15min of reaction, and neutralize the mixture with concentrated hydrochloric acid. Filtration to collect solid sediment, drying 0.5g of sulfoazolone raw drug. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 21:01:54
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