3939-09-1
2,4-Difluorobenzonitrile
CAS: 3939-09-1;103496-86-2
Molecular Formula: C7H3F2N
3939-09-1 - Names and Identifiers
| Name | 2,4-Difluorobenzonitrile |
| Synonyms | NCR BF DF 2-difluorobenzotrile 2,4-difluorobenzonilyile 2,4-Difluorobenzonitrile 2,4-DIFLUOROBENZONITRILE 2,4-Difluorobenzenecarbonitrile |
| CAS | 3939-09-1 103496-86-2 |
| EINECS | 223-523-8 |
| InChI | InChI=1/C7H3F2N/c8-6-2-1-5(4-10)7(9)3-6/h1-3H |
3939-09-1 - Physico-chemical Properties
| Molecular Formula | C7H3F2N |
| Molar Mass | 139.1 |
| Density | 1.246 |
| Melting Point | 47-49 °C (lit.) |
| Boling Point | 189°C |
| Flash Point | >230°F |
| Solubility | soluble in Methanol |
| Vapor Presure | 0.845mmHg at 25°C |
| Appearance | Crystalline |
| Color | White to Almost white |
| BRN | 1940316 |
| Storage Condition | Sealed in dry,Room Temperature |
| Refractive Index | 1.486 |
| Physical and Chemical Properties | Melting point 45-50°C |
| Use | Used as a pharmaceutical Intermediate |
3939-09-1 - Risk and Safety
| Risk Codes | R20/21/22 - Harmful by inhalation, in contact with skin and if swallowed. R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S37/39 - Wear suitable gloves and eye/face protection S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. S36/37 - Wear suitable protective clothing and gloves. |
| WGK Germany | 3 |
| HS Code | 29269090 |
| Hazard Note | Toxic |
3939-09-1 - Reference Information
| application | 2,4-difluorobenzonitrile can be used in the synthesis of medicines, pesticides and fluoropolymers. The pesticide synthesized with it has strong selectivity, low usage, low toxicity to humans, and low residue. It is a green pesticide with very broad development prospects. |
| preparation | add 500 ml toluene, 57.6g (0.3 mol) 2, 4-difluorobromobenzene, 11.8g (0.36 mol, 1.2 equivalent) sodium cyanide, 5.73g (30 mmol, 0.1 equivalent) cuprous iodide in turn under nitrogen protection, 10g potassium iodide (60 mmol, 0.2 equivalent),26.4g N,N'-dimethylethyl diamine (0.3 mol, 1.0 equivalent), stirred and reacted at 110 ℃ under nitrogen protection for 30 hours, End the reaction, Then filter, and fractionate the filtrate under reduced pressure to obtain white crystal 2,4-difluorobenzonitrile with 81% yield and 98% purity, boiling point 84~86 ℃(2666.4Pa), melting point 47~49 ℃. |
| use | as a pharmaceutical intermediate |
Last Update：2024-04-09 02:00:05
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