20372-63-8
4,5-difluoro-2-nitrobenzoic acid
CAS: 20372-63-8
Molecular Formula: C7H3F2NO4
20372-63-8 - Names and Identifiers
| Name | 4,5-difluoro-2-nitrobenzoic acid |
| Synonyms | 4,5-Difluoro-2-nitrobenzoicaci 4,5-DIFLUORO-2-NITROBENZOIC ACID 4,5-difluoro-2-nitrobenzoic acid 2-NITRO-4,5-DIFLUOROBENZOIC ACID 4,5-Difluoro-2-nitrobenzoic acid 4,5-two fluoro -2-Nitrobenzoic Acid Benzoic acid, 4,5-difluoro-2-nitro- 4,5-difluoro-2-nitrobenzenecarboxylic acid |
| CAS | 20372-63-8 |
| EINECS | 1533716-785-6 |
| InChI | InChI=1/C7H3F2NO4/c8-4-1-3(7(11)12)6(10(13)14)2-5(4)9/h1-2H,(H,11,12) |
20372-63-8 - Physico-chemical Properties
| Molecular Formula | C7H3F2NO4 |
| Molar Mass | 203.1 |
| Density | 1.661±0.06 g/cm3(Predicted) |
| Melting Point | 165-167 °C (lit.) |
| Boling Point | 349.7±42.0 °C(Predicted) |
| Flash Point | 165.3°C |
| Vapor Presure | 1.73E-05mmHg at 25°C |
| pKa | 1.85±0.25(Predicted) |
| Storage Condition | Sealed in dry,Room Temperature |
| Refractive Index | 1.563 |
20372-63-8 - Risk and Safety
| Hazard Symbols | Xi - Irritant |
| Risk Codes | 36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | 26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. |
| WGK Germany | 3 |
| HS Code | 29163990 |
| Hazard Class | IRRITANT |
20372-63-8 - Introduction
4,5-difluoro-2-nitrobenzoic acid is an organic compound with the chemical formula C7H4F2NO4. The following is a description of its nature, use, preparation and safety information:
Nature:
-Appearance: Colorless crystal or yellowish solid.
-Melting point: About 120-124 degrees Celsius.
-Solubility: Soluble in many organic solvents such as ethanol, ether and dichloromethane.
Use:
- 4,5-difluoro-2-nitrobenzoic acid is commonly used in the preparation of pesticides such as insecticides, fungicides and plant growth regulators.
-It can also be used as a reaction reagent in organic synthesis and participate in certain chemical reactions.
Method:
The preparation of 4,5-difluoro-2-nitrobenzoic acid is usually carried out by the following steps:
1. Preparation of 3,4-difluoronitrobenzene: 3,4-difluoronitrobenzene and sodium nitrite were reacted under acidic conditions.
2. Nitro reduction of 3,4-difluoronitrobenzene: 3,4-difluoronitrobenzene and sodium sulfite are reacted under acidic conditions.
3. Preparation of 3,4-difluorobenzoic acid: 3,4-difluoronitrobenzene and sodium hydroxide were reacted under alkaline conditions.
4. Preparation of 4,5-difluoro-2-nitrobenzoic acid: Substitution reaction of 3,4-difluorobenzoic acid in the presence of nitric acid.
Safety Information:
- 4,5-difluoro-2-nitrobenzoic acid is an organic compound that is potentially dangerous.
-Wear appropriate personal protective equipment such as goggles, gloves and protective clothing when used.
-Avoid direct contact and inhalation of its dust or vapor.
-Pay attention to good ventilation conditions during operation, and avoid contact with flammable substances, oxidants and strong acids.
-When storing and handling, follow relevant safety procedures and store them in a dry, cool and well-ventilated place.
-If swallowed or exposed to the compound, seek medical assistance immediately and bring the compound's label or packaging to a medical facility.
Nature:
-Appearance: Colorless crystal or yellowish solid.
-Melting point: About 120-124 degrees Celsius.
-Solubility: Soluble in many organic solvents such as ethanol, ether and dichloromethane.
Use:
- 4,5-difluoro-2-nitrobenzoic acid is commonly used in the preparation of pesticides such as insecticides, fungicides and plant growth regulators.
-It can also be used as a reaction reagent in organic synthesis and participate in certain chemical reactions.
Method:
The preparation of 4,5-difluoro-2-nitrobenzoic acid is usually carried out by the following steps:
1. Preparation of 3,4-difluoronitrobenzene: 3,4-difluoronitrobenzene and sodium nitrite were reacted under acidic conditions.
2. Nitro reduction of 3,4-difluoronitrobenzene: 3,4-difluoronitrobenzene and sodium sulfite are reacted under acidic conditions.
3. Preparation of 3,4-difluorobenzoic acid: 3,4-difluoronitrobenzene and sodium hydroxide were reacted under alkaline conditions.
4. Preparation of 4,5-difluoro-2-nitrobenzoic acid: Substitution reaction of 3,4-difluorobenzoic acid in the presence of nitric acid.
Safety Information:
- 4,5-difluoro-2-nitrobenzoic acid is an organic compound that is potentially dangerous.
-Wear appropriate personal protective equipment such as goggles, gloves and protective clothing when used.
-Avoid direct contact and inhalation of its dust or vapor.
-Pay attention to good ventilation conditions during operation, and avoid contact with flammable substances, oxidants and strong acids.
-When storing and handling, follow relevant safety procedures and store them in a dry, cool and well-ventilated place.
-If swallowed or exposed to the compound, seek medical assistance immediately and bring the compound's label or packaging to a medical facility.
Last Update：2024-04-10 22:29:15
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View History
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