554-00-7
2,4-Dichloroaniline
CAS: 554-00-7
Molecular Formula: C6H5Cl2N
554-00-7 - Names and Identifiers
| Name | 2,4-Dichloroaniline |
| Synonyms | 2,4-dichloro 2,4-Dichloroaniline 2,4-dichloro-anilin 2,4-Dichloro aniline Aniline, 2,4-dichloro- 2,4-dichloro-benzenamin 2,4-Dichlorophenylamine 2,4-Dichloroaniline,Pract. 2,4-DICHLOROANILINE PESTANAL |
| CAS | 554-00-7 |
| EINECS | 209-057-8 |
| InChI | InChI=1/C6H5Cl2N/c7-4-2-1-3-5(9)6(4)8/h1-3H,9H2 |
554-00-7 - Physico-chemical Properties
| Molecular Formula | C6H5Cl2N |
| Molar Mass | 162.02 |
| Density | 1.567 |
| Melting Point | 59-62 °C (lit.)60-65 °C |
| Boling Point | 245 °C (lit.) |
| Flash Point | 115°C |
| Water Solubility | Insoluble, |
| Solubility | methanol: soluble, clear, very faintly brownish-yellow |
| Vapor Presure | 1hPa at 78℃ |
| Appearance | Crystalline Powder |
| Specific Gravity | 1.567 (20℃) |
| Color | White to beige |
| BRN | 386422 |
| pKa | 2.05(at 22℃) |
| Storage Condition | 0-6°C |
| Refractive Index | 1.6000 (estimate) |
| Physical and Chemical Properties | White needle-like crystals. Melting point of 63 ℃, boiling point of 245 ℃, relative density of 1.567(20/4 ℃), soluble in ethanol, ether and other organic solvents and acids. Slightly soluble in water. The color will become darker in the air. |
| Use | As a synthetic raw material of anti-infective ciprofloxacin, pesticide fungicide amidozole, herbicide (PUMA) and dye |
554-00-7 - Risk and Safety
| Risk Codes | R23/24/25 - Toxic by inhalation, in contact with skin and if swallowed. R33 - Danger of cumulative effects R50/53 - Very toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment. |
| Safety Description | S28 - After contact with skin, wash immediately with plenty of soap-suds. S36/37 - Wear suitable protective clothing and gloves. S45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.) 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. S28A - |
| UN IDs | UN 3442 6.1/PG 2 |
| WGK Germany | 3 |
| RTECS | BX2600000 |
| FLUKA BRAND F CODES | 8-9-23 |
| TSCA | Yes |
| HS Code | 29214210 |
| Hazard Note | Toxic/Irritant |
| Hazard Class | 6.1 |
| Packing Group | II |
554-00-7 - Reference Information
| LogP | 2.78 at 20℃ |
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| EPA chemical information | Information provided by: ofmpub.epa.gov (external link) |
| overview | 2,4-dichloroaniline is an important drug and dye intermediate. it is a white needle-like crystal, soluble in ethanol, ether and other organic solvents and acids, slightly soluble in water, easy to oxidize and change color in air, with a melting point of 59-63 ℃ and a boiling point of 242 ℃. |
| The method for preparing | to synthesize 2,4-dichloroaniline includes the following steps, the following concentrations are all mass concentrations: 1) The methanol or ethanol solution with a concentration of 25-35% p-chloronitrobenzene and an ammonium chloride aqueous solution with a concentration of 5-10% are added to the reactor, and the weight ratio of p-chloronitrobenzene to ammonium chloride is 10:1, heating and stirring under nitrogen protection, adding reducing agent when the temperature reaches 75-80 ℃, the weight ratio of p-chloronitrobenzene to reducing agent is 1:1~3, controlling the adding speed of reducing agent to maintain the reaction temperature at 75-80 ℃, after the reducing agent is added, the reaction liquid returns to colorless and transparent; 2) Stir and cool under nitrogen protection, slowly add concentrated hydrochloric acid when the temperature is lower than 60 ℃, and keep the reaction temperature at 55-60 ℃ during the addition of concentrated hydrochloric acid, the weight ratio of p-chloronitrobenzene to concentrated hydrochloric acid is 1:15-20, and the reaction at 60 ℃ for 1-3 hours after the addition of concentrated hydrochloric acid; 3) The above reaction solution is cooled to room temperature, the filter residue is filtered and discarded, the pH value of the filtrate is adjusted in an ice bath until the solid is precipitated, and the obtained solid is recrystallized in an alcohol aqueous solution with a concentration of 40-60% to obtain 2,4-Dichloroaniline white needle crystal. The above-mentioned alcohol aqueous solution is an aqueous solution of ethanol or methanol. |
| use | as a dye intermediate. Used as a synthetic raw material for anti-infective drug ciprofloxacin, pesticide fungicide amidazole, herbicide (PUMA) and dye |
| production method | is obtained by chlorination and hydrolysis of acetanilide. |
| category | toxic substances |
| toxicity classification | highly toxic |
| acute toxicity | oral-rat LD50: 1600 mg/kg; Oral-mouse LD50: 400 mg/kg |
| flammability hazard characteristics | Open flame is combustible; combustion releases toxic chloride and nitrogen oxide smoke; acts with oxidant |
| storage and transportation characteristics | warehouse ventilation and low temperature drying; Store separately from oxidants, food additives and acids |
| fire extinguishing agent | foam, carbon dioxide, dry powder, sand. |
| toxic substance data | information provided by: pubchem.ncbi.nlm.nih.gov (external link) |
Last Update：2024-04-09 02:00:05
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