BISPYRIBAC
Bispyribac-sodium
CAS: 125401-92-5;125401-75-4
Molecular Formula: C19H17N4NaO8
BISPYRIBAC - Names and Identifiers
| Name | Bispyribac-sodium |
| Synonyms | NOMINEE BISPYRIBAC Grass-short Bispyribac sod BISPYRIBAC-SODIUM Bispyribac-sodium Bispyribac sodium salt Bispyribac-sodium Standard Herbicide-Bispyribac-sodium 2,6-bis(4,6-dimethoxypyrimidin-2-yloxy)benzoic acid 2,6-BIS[(4,6-DIMETHOXY-2-PYRIMIDINYL)OXY]BENZOIC ACID Sodium 2,6-bis(4,6-dimethoxy-2-pyrimidinyloxy)benzoate Sodium 2,6-bis[(4,6-dimethoxypyrimidin-2-yl)oxy]benzoate Sodium 2,6-bis[(4,6-dimethoxypyrimidin-2-yl)oxy] benzoate 2,6-Bis((4,6-dimethoxy-2-pyrimidinyl)oxy)-benzoic acid sodium salt Bispyribac sodium salt,Sodium 2,6-bis(4,6-dimethoxy-2-pyrimidinyloxy)benzoate |
| CAS | 125401-92-5 125401-75-4 |
| EINECS | 603-066-4 |
| InChI | InChI=1/C19H17N4NaO8/c1-26-12-8-13(27-2)21-18(20-12)30-10-6-5-7-11(16(10)17(24)25)31-19-22-14(28-3)9-15(23-19)29-4;/h5-9H,1-4H3,(H,24,25);/q;+1/p-1 |
| InChIKey | FUHMZYWBSHTEDZ-UHFFFAOYSA-M |
BISPYRIBAC - Physico-chemical Properties
| Molecular Formula | C19H17N4NaO8 |
| Molar Mass | 452.35 |
| Melting Point | 223-224°C |
| Boling Point | 686.4℃ at 760 mmHg |
| Water Solubility | 73.3 g/l at 20 ºC |
| Solubility | DMSO (Slightly, Heated, Sonicated), Methanol (Slightly), Water (Slightly) |
| Appearance | neat |
| Color | White to Off White |
| Storage Condition | 0-6°C |
| Physical and Chemical Properties | Melting Point: 223-224°C water-soluble: 73.3g/l at 20°C |
| Use | It is used to control grass weeds and broad-leaved weeds in paddy fields, and can be used in seedling fields, direct-seeding fields, seedling transplanting fields and seedling-throwing fields. |
BISPYRIBAC - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36 - Irritating to the eyes |
| Safety Description | 26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. |
| WGK Germany | 3 |
| RTECS | DG4436200 |
| Toxicity | LD50 in male, female rats (mg/kg): 4111, 2635 orally; in rats (mg/kg): >2000 dermally; LC50 in bluegill sunfish, rainbow trout (ppm): >100, >100 (Yokoyama) |
BISPYRIBAC - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| toxicity | male rat acute oral LD504111mg/kg, female> 2635 mg/kg, rat acute percutaneous LD50>200 mg/kg. It has no irritating effect on rabbit skin, slight irritating effect on rabbit eyes, and no teratogenic or mutagenic effect. Quail oral LD502250mg/kg, sunfish LC50>100mg/L (96h), Daphnia LC50>100mg/L(48h). |
| Uses | Pyrimidine salicylic acid herbicides, acetolactase inhibitors, work through the biosynthesis of Yinzhi branched chain amino acids, suitable for crop rice. It is mainly used for weeding after seedlings of direct seeding rice, which is effective for barnyard grass at 1~7 leaf stage, especially for 3~6 leaf stage. It also has good control effects on the forearm grass, mangji, arabia sorghum, purple amaranth, Commelina communis, melon fur, special sedge, broken rice sedge, big horse Tang, firefly, fake purslane, and corn grass. This product has stable effect on most soils and climatic environments, and can be mixed with other pesticides. It is used to control gramineous weeds and broadleaf weeds such as barnyard grass in paddy fields. It can be used in seedling fields, direct seeding fields, small seedling transplanting fields and seedling throwing fields. Bicafer is an ultra-efficient, broad-spectrum and low-toxic herbicide. It is mainly used to control gramineous weeds and broadleaf weeds such as barnyard grass in paddy fields. It can be used in seedling fields, direct seeding fields, small seedling transfer fields and seedling throwing fields. |
| Production method | Using diethyl malonate and thiourea as starting materials, it is condensed in the presence of sodium methoxide to form 4, 6-dihydroxy-2-pyrimidine thiophenol sodium, and then through a series of reactions such as methylation, chlorination, methoxylation and oxidation to prepare 4, 6-dimethoxy-2-methylsulfonyl pyrimidine, and finally 4, 6-Dimethoxy-2-methylsulfonylpyrimidine reacts with 2, 6-dihydroxybenzoic acid under alkaline conditions to obtain bisoxyl ether. The total yield of the six-step reaction was 41% and the content was 95%. Bicusyl ether can also be prepared by the reaction of 2, 6-dihydroxybenzoic acid and 2-methylsulfonyl -4, 6-dimethoxypyrimidine. However, this method requires the reaction to be carried out under anhydrous conditions. The reaction yield is only 28% by applying flammable and difficult-to-store dangerous sodium hydride and the more expensive solvent tetrahydrofuran. |
Last Update：2024-04-09 15:16:47
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