1-(1,3-benzothiazol-2-yl)-1,3-dimethylurea
Methabenzthiazuron
CAS: 18691-97-9
Molecular Formula: C10H11N3OS
1-(1,3-benzothiazol-2-yl)-1,3-dimethylurea - Names and Identifiers
| Name | Methabenzthiazuron |
| Synonyms | bay74283 bayer5633 preparation5633 metabenzthiazuron methbenzthiazuron Methabenzthiazuron 1-(2-benzothiazolyl)-1,3-dimethyl-ure 1,3-dimethyl-3-(2-benzthiazolyl)-harnstoff 1-(1,3-benzothiazol-2-yl)-1,3-dimethylurea n-methyl-n'-methyl-n'-(2-benzothiazolyl)urea n-methyl-n'-methyl-n'-(2-benzothiazolyl)urea |
| CAS | 18691-97-9 |
| EINECS | 242-505-0 |
| InChI | InChI=1/C10H11N3OS/c1-11-9(14)13(2)10-12-7-5-3-4-6-8(7)15-10/h3-6H,1-2H3,(H,11,14) |
1-(1,3-benzothiazol-2-yl)-1,3-dimethylurea - Physico-chemical Properties
| Molecular Formula | C10H11N3OS |
| Molar Mass | 221.28 |
| Density | 1.2527 (rough estimate) |
| Melting Point | 119-120.5° |
| Flash Point | 11°C |
| Water Solubility | 59mg/L(20 ºC) |
| Solubility | DMSO, Methanol (Sparingly) |
| Appearance | neat |
| Color | Off-White to Pale Beige |
| Merck | 14,5939 |
| BRN | 196633 |
| pKa | 12.83±0.46(Predicted) |
| Storage Condition | APPROX 4°C |
| Refractive Index | 1.6740 (estimate) |
| Physical and Chemical Properties | Storage Conditions: APPROX 4 ℃ RTECS:YR8980000 |
1-(1,3-benzothiazol-2-yl)-1,3-dimethylurea - Risk and Safety
| Risk Codes | R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. R39/23/24/25 - R23/24/25 - Toxic by inhalation, in contact with skin and if swallowed. R11 - Highly Flammable |
| Safety Description | S60 - This material and its container must be disposed of as hazardous waste. S61 - Avoid release to the environment. Refer to special instructions / safety data sheets. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) S16 - Keep away from sources of ignition. S7 - Keep container tightly closed. |
| UN IDs | UN 3077 9/PG 3 |
| WGK Germany | 2 |
| RTECS | YR8980000 |
| HS Code | 29342000 |
| Hazard Class | 9 |
| Packing Group | III |
| Toxicity | LD50 in mice (mg/kg): >1000 orally; in male, female rats (mg/kg): >2500, >2500 orally; 540, 315 i.p. (Kimmerle, Lser) |
1-(1,3-benzothiazol-2-yl)-1,3-dimethylurea - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| toxicity | acute oral LD50 in rats> 2500 mg/kg, mice, rabbits and dogs> 1000 mg/kg; Acute percutaneous LD50 in female rats> 500 mg/kg, acute inhalation LC50500mg/m3 (4h) in rats. Subacute non-action dose 150mg/kg. Goldfish LC50>20mg/L (48h). Safe for bees. |
| use | substituted urea herbicides, by inhibiting the hill reaction in plant photosynthetic crops, to achieve the purpose of weeding. Mainly used in winter crops such as wheat, legume crops such as peas, and crops such as onions and vegetables. The dosage of weeding in wheat field is 15~22.5g/100 m2, and that in bean field is 14.3~28.5g/100 m2. Since the agent is mainly absorbed by the roots, the soil should be moist when applying. Not effective for weeds propagated by roots. It is safer for subsequent crops. Not suitable for spring barley. Thiazolon is a broad-spectrum herbicide used before and after budding to control weeds in wheat and beans. It has a good control effect on many monocotyledonous and dicotyledonous weeds. Mainly absorbed by roots, weeds died within 14-20 days after application. |
| Production method | First react aniline and carbon disulfide in an aqueous solution of sodium carbonate to prepare N-dithiocarboxylic acid sodium aniline, and then react with monomethylamine to form 1-phenyl-3-methylthiourea, and then cyclized into 2-methylaminobenzothiazole, and then reacted with methyl isocyanate to obtain thiazuron. In the presence of sodium carbonate, aniline reacts with CS2 to form sodium phenylaminothioformate, and then reacts with monomethylamine to prepare N-phenyl-N'-methyl thiourea. It then reacts with sulfuryl chloride to produce 2-methylaminobenzothiazole. Finally, it reacts with methyl isocyanate to synthesize methyl benzethirone. Or react 2-methylaminobenzothiazole with methylcarbamoyl chloride to produce methylphenyclidine. |
| category | pesticide |
| toxicity classification | poisoning |
| acute toxicity | oral-rat LD50: 2500 mg/kg; Oral-mouse LD50: 1000 mg/kg |
| flammability hazard characteristics | Combustion produces toxic sulfur oxides and nitrogen oxide gases |
| storage and transportation characteristics | warehouse ventilation and low temperature drying; separate from food raw materials storage and transportation |
| fire extinguishing agent | dry powder, foam, sand |
Last Update：2024-04-10 22:29:15
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