RPA 090946
1-(2,4-dichlorophenylcarbamoyl)cyclopropancarboxylic acid
CAS: 113136-77-9
Molecular Formula: C11H9Cl2NO3
RPA 090946 - Names and Identifiers
RPA 090946 - Physico-chemical Properties
| Molecular Formula | C11H9Cl2NO3 |
| Molar Mass | 274.1 |
| Density | 1.4691-1.4820 g/cm3 |
| Melting Point | approximate 196℃ |
| Boling Point | 513.2±50.0 °C(Predicted) |
| Flash Point | 264.166°C |
| Water Solubility | Practically insoluble in water |
| Vapor Presure | 0mmHg at 25°C |
| Appearance | neat |
| Color | White to Light yellow |
| pKa | 3.39±0.20(Predicted) |
| Storage Condition | Sealed in dry,Room Temperature |
| Refractive Index | 1.687 |
| Physical and Chemical Properties | storage conditions 0-6°C |
| Use | Cyclopropylcarboxylic acid plant growth regulators, which have synergistic effect with ethephon, are mainly used in cotton crops. |
RPA 090946 - Risk and Safety
| Risk Codes | R22 - Harmful if swallowed R51/53 - Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | 61 - Avoid release to the environment. Refer to special instructions / safety data sheets. |
| UN IDs | 2811 |
| WGK Germany | 2 |
| Hazard Class | 6.1(b) |
| Packing Group | III |
RPA 090946 - Reference Information
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| toxicity | acute oral LD50 in rats is 315 mg/kg (male) and 208 mg/kg (female); Acute percutaneous LD50>2000 mg/kg in rabbits and acute inhalation LC50>5.15g/L(4h) in rats; It has moderate stimulation to rabbit skin and no stimulation to rabbit eyes. Mallard oral LD50>215mg/kg, quail 216mg/kg; Rainbow trout LC50>11mg/L, sunfish> 16mg/L(96h), Daphnia LC50>13mg/L (48h). |
| use | cyclopropylcarboxylic acid plant growth regulator, mixed with ethephon, has synergistic effect and is mainly used for cotton crops. |
| Production method | Ethyl cyclopropyl -1, 1-dicarboxylate is synthesized first. 1000mL dichloroethane, 160g K2CO3,2.4g tetrabutyl ammonium bromide were placed in a reaction bottle, heated until reflux, and 120g diethyl malonate was added dropwise within 0.5h. After dropping, reflux reaction for 6 hours, cooling, adding 300mL of water, stirring, liquid separation, drying the organic layer with anhydrous Na2SO4, recovering dichloroethane under normal pressure, collecting 94~98 ℃/1333.22Pa fraction under reduced pressure, totaling 116g, with a yield of 83%, and the product is colorless oily liquid with special fragrance. Re-synthesis of cyclopropanoic acid. 4.6g of sodium metal, 100mL of methanol, heated and concentrated to dryness, 150mL of anhydrous toluene and 32.4 2,4-dichloroaniline were added, stirred, 31.6g of ethyl cyclopropyl -1,1-dicarboxylate were added dropwise at room temperature, heated and fractionated to 110 ℃, 250mL of water was added, refluxing was hydrolyzed for 2 hours, cooling and liquid separation were added, water was acidified to pH<3 relative to dilute hydrochloric acid, a large amount of white solid was precipitated, 42.7g of product was obtained, m.p.191 ~ 193 ℃ [literature value 192~193.5 ℃]. The yield is 76.8% and the purity is 98.6%. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-10 22:29:15
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