- 2-Chloro-4-fluorotoluene
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- $8.00 / 1KG
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2025-09-25
- CAS:452-73-3
- Min. Order: 1KG
- Purity: 99%
- Supply Ability: g-kg-tons, free sample is available
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| | 2-Chloro-4-fluorotoluene Basic information |
| | 2-Chloro-4-fluorotoluene Chemical Properties |
| Boiling point | 154-156 °C (lit.) | | density | 1.197 g/mL at 25 °C (lit.) | | refractive index | n20/D 1.499(lit.) | | Fp | 122 °F | | storage temp. | 2-8°C | | form | clear liquid | | color | Colorless to Light yellow | | Specific Gravity | 1.197 | | BRN | 1931690 | | InChI | InChI=1S/C7H6ClF/c1-5-2-3-6(9)4-7(5)8/h2-4H,1H3 | | InChIKey | CSARJIQZOSVYHA-UHFFFAOYSA-N | | SMILES | C1(C)=CC=C(F)C=C1Cl | | CAS DataBase Reference | 452-73-3(CAS DataBase Reference) | | NIST Chemistry Reference | 2-Chloro-4-fluorotoluene(452-73-3) |
| Hazard Codes | Xi,F | | Risk Statements | 10-36/37/38 | | Safety Statements | 16-26-36/37/39-36 | | RIDADR | UN 1993 3/PG 3 | | WGK Germany | 3 | | Hazard Note | Irritant/Flammable | | HazardClass | 3 | | PackingGroup | III | | HS Code | 29039990 | | Storage Class | 3 - Flammable liquids | | Hazard Classifications | Eye Irrit. 2
Flam. Liq. 3
Skin Irrit. 2
STOT SE 3 |
| | 2-Chloro-4-fluorotoluene Usage And Synthesis |
| Chemical Properties | colorless to light yellow liqui | | Uses | 2-Chloro-4-fluorotoluene has been used in the preparation of 2-chloro-4-fluoro-benzylbromide. | | General Description | 2-Chloro-4-fluorotoluene generates vibronically excited, jet-cooled benzyl-type radicals by corona excited supersonic expansion coupled with a pinhole-type glass nozzle technique. | | Synthesis | 1. In a 1 L reactor (equipped with a condenser and a gas phase outlet diameter of 1/6 to 1/5 the diameter of the reactor), reduce the temperature to 20°C or lower. Slowly add 424 g (21.2 mol, 20 equiv.) of anhydrous hydrogen fluoride under stirring conditions, and further reduce the temperature after the addition is complete.
2. 150 g (1.059 mol, 1 eq.) of 3-chloro-4-methylaniline was added dropwise at 5 °C or lower, with the dropwise acceleration controlled to maintain the reaction temperature in the range of 5 to 15 °C, and the final addition was completed at about 3 °C.
3. after completion of the spiking, the temperature was lowered to 5 °C or lower, 73.1 g (1.06 mol, 1 eq.) of sodium nitrite was added in batches, and the reaction temperature was controlled to be in the range of -5 to 15 °C for 4 hours, followed by a heat hold for 1 hour.
4. Upon completion of the reaction, the reactor was programmed to warm up (strictly control the rate of warming: 0.5 to 1 °C per hour in the range of 0 to 20 °C; 1 to 2 °C per hour in the range of 20 to 80 °C), and was finally warmed up to 80 °C and held for 2 hours.
5. At the end of the holding time, reduce the temperature to 30 to 35°C and leave to stratify. The organic layer was neutralized to pH 7-8 with a dilute alkaline solution, followed by hydrodistillation.
6. 141 g of the organic layer at room temperature was collected and purity was 93.4% by gas chromatography. By distillation 125.1 g of the target product 2-chloro-4-fluorotoluene was obtained in 81.8% yield and 99.9% purity by gas chromatography. | | References | [1] Patent: CN108569948, 2018, A. Location in patent: Paragraph 0035-0059 |
| | 2-Chloro-4-fluorotoluene Preparation Products And Raw materials |
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